Simple interset \\( = \\frac{P*R*T}{100}\\) Where, P=principal ,R= rate of interest per annum , T= time in years

Use Simple interest formula to find compound interest

Use Simple interest formula to find compound interest

Use Simple interest formula to find compound interest

Use Simple interest formula to find compound interest

S.I. = \\( \\frac{P\\times R\\times T}{100}\\)

Use compound interest formula for annually.

Use Simple interest formula to find compound interest

Use the formula A = \\( P ({1 +{R \\over 100}})^n\\)

A = CI +P

The population of the town decreases by 10% every year. Thus, it has a new population every year. So the population for the next year is calculated on the current year population.