Question

The populations of a town increased by 12% during first years and decrease by 10% during second year. if the present populations isb50400 what it was 2 years ago

Answer 1

using compounding formula
$a + b + \frac{ab}{100}$
12-10-1.2=0.8% overall net
so x+0.8x/100=50400
or 1008x=50400000
x=50000 ans