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## Credits

Birsa Institute of Technology (BIT), Sindri
Suraj Kumar has created this Calculator and 1000+ more calculators!
Meerut Institute of Engineering and Technology (MIET), Meerut
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## Present Population when Future Population at the End of n Decades is Given Solution

STEP 0: Pre-Calculation Summary
Formula Used
present_population = Future population-Migration-Natural increase
P = Pn-M-N
This formula uses 3 Variables
Variables Used
Future population- Future population means the population of a city after the design period.
Migration- Migration means moving within a state, country, or continent.
Natural increase- Natural increase is the difference between the numbers of births and deaths in a population.
STEP 1: Convert Input(s) to Base Unit
Future population: 100 --> No Conversion Required
Migration: 30 --> No Conversion Required
Natural increase: 10 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
P = Pn-M-N --> 100-30-10
Evaluating ... ...
P = 60
STEP 3: Convert Result to Output's Unit
60 --> No Conversion Required
FINAL ANSWER
60 <-- Present population
(Calculation completed in 00.016 seconds)

## < 11 Other formulas that you can solve using the same Inputs

Average Incremental Increase when Future Population from Incremental Increase Method is Given
average_incremental_increase = (Future population-Present population-(Number of decades*Average increment))/(Number of decades*(Number of decades+1)/2) Go
Present Population when Future Population from Incremental Increase Method is Given
present_population = (Future population-(Number of decades*Average increment)-(Number of decades*(Number of decades+1)/2)*Average incremental increase) Go
Average Increase Per Decade when Future Population from Incremental Increase Method is Given
average_increment = (Future population-Present population-(Number of decades*(Number of decades+1)/2)*Average incremental increase)/Number of decades Go
Number of Decades when Future Population from Geometrical Increase Method is Given
number_of_decades = log((Future population/Present population),(1+(Average percentage increase/100))) Go
Average Percentage Increase when Future Population from Geometrical Increase Method is Given
average_percentage_increase = (((Future population/Present population)^(1/Number of decades))-1)*100 Go
Present Population when Future Population from Geometrical Increase Method is Given
present_population = Future population/(1+(Average percentage increase/100))^(Number of decades) Go
Present Population when Future Population at the End of n Decades is Given
present_population = Future population-(Number of decades*Average increment) Go
Average Increment for a Decade when Future Population is Given
average_increment = (Future population-Present population)/Number of decades Go
Number of Decades when Future Population is Given
number_of_decades = (Future population-Present population)/Average increment Go
Average Increment for a Decade when Future Population at End of 2 Decades is Given
average_increment = (Future population-Present population)/2 Go
Present Population when Future Population at the End of 2 Decades is Given
present_population = Future population-(2*Average increment) Go

## < 10 Other formulas that calculate the same Output

Present Population when Future Population from Incremental Increase Method is Given
present_population = (Future population-(Number of decades*Average increment)-(Number of decades*(Number of decades+1)/2)*Average incremental increase) Go
Present Population when Natural Increase is Given
present_population = Natural increase/((Average birth rate per year*Design period)-(Average death rate per year*Design period)) Go
Present Population when Future Population of 2 Decades by Incremental Increase Method is Given
present_population = (Future population-(2*Average increment)-(2*(2+1)/2)*Average incremental increase) Go
Present Population when Future Population of 3 Decades by Incremental Increase Method is Given
present_population = (Future population-(3*Average increment)-(3*(3+1)/2)*Average incremental increase) Go
Present Population when Future Population from Geometrical Increase Method is Given
present_population = Future population/(1+(Average percentage increase/100))^(Number of decades) Go
Present Population when Future Population at the End of n Decades is Given
present_population = Future population-(Number of decades*Average increment) Go
Present Population when Future Population of 2 Decades by Geometrical Increase Method is Given
present_population = Future population/(1+(Average percentage increase/100))^(2) Go
Present Population when Future Population of 3 Decades by Geometrical Increase Method is Given
present_population = Future population/(1+(Average percentage increase/100))^(3) Go
Present Population when Future Population at the End of 2 Decades is Given
present_population = Future population-(2*Average increment) Go
Present Population when Future Population at the End of 3 Decades is Given
present_population = Future population-(3*Average increment) Go

### Present Population when Future Population at the End of n Decades is Given Formula

present_population = Future population-Migration-Natural increase
P = Pn-M-N

## What is population forecasting ?

Population forecasting is defined as the method of determining the expected population for a particular design period of a water supply system with the help of the study and analysis of future events and available records.

## How to Calculate Present Population when Future Population at the End of n Decades is Given?

Present Population when Future Population at the End of n Decades is Given calculator uses present_population = Future population-Migration-Natural increase to calculate the Present population, The Present Population when Future Population at the End of n Decades is Given calculates the value of present population when we have prior information of other parameters used. Present population and is denoted by P symbol.

How to calculate Present Population when Future Population at the End of n Decades is Given using this online calculator? To use this online calculator for Present Population when Future Population at the End of n Decades is Given, enter Future population (Pn), Migration (M) and Natural increase (N) and hit the calculate button. Here is how the Present Population when Future Population at the End of n Decades is Given calculation can be explained with given input values -> 60 = 100-30-10.

### FAQ

What is Present Population when Future Population at the End of n Decades is Given?
The Present Population when Future Population at the End of n Decades is Given calculates the value of present population when we have prior information of other parameters used and is represented as P = Pn-M-N or present_population = Future population-Migration-Natural increase. Future population means the population of a city after the design period, Migration means moving within a state, country, or continent. and Natural increase is the difference between the numbers of births and deaths in a population.
How to calculate Present Population when Future Population at the End of n Decades is Given?
The Present Population when Future Population at the End of n Decades is Given calculates the value of present population when we have prior information of other parameters used is calculated using present_population = Future population-Migration-Natural increase. To calculate Present Population when Future Population at the End of n Decades is Given, you need Future population (Pn), Migration (M) and Natural increase (N). With our tool, you need to enter the respective value for Future population, Migration and Natural increase and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
How many ways are there to calculate Present population?
In this formula, Present population uses Future population, Migration and Natural increase. We can use 10 other way(s) to calculate the same, which is/are as follows -
• present_population = Future population-(Number of decades*Average increment)
• present_population = Future population/(1+(Average percentage increase/100))^(Number of decades)
• present_population = (Future population-(Number of decades*Average increment)-(Number of decades*(Number of decades+1)/2)*Average incremental increase)
• present_population = Future population-(2*Average increment)
• present_population = Future population-(3*Average increment)
• present_population = Future population/(1+(Average percentage increase/100))^(2)
• present_population = Future population/(1+(Average percentage increase/100))^(3)
• present_population = (Future population-(2*Average increment)-(2*(2+1)/2)*Average incremental increase)
• present_population = (Future population-(3*Average increment)-(3*(3+1)/2)*Average incremental increase)
• present_population = Natural increase/((Average birth rate per year*Design period)-(Average death rate per year*Design period)) Let Others Know
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