Question

the population of a place ina particular year increased by 15 percent. Next year,it decreased by 15percent. Find the net increase or decrease percent in the initial population.

If anyone know the answer than plzz tell​

Answer 1

Answer:

Decrease of 0.0225%

Step-by-step explanation:

On the face of it, it would seem to be a net change of 0. But let's work it out and see that it isn't!

We start with a population - let's call that P.

It increases by 15%, so that is:

1.15 P

And now it decreases by 15% - we can do that by saying the population is now 85% of what it was:

0.85 (1.15)P=.9775P

This means the population is lower than it started with and is lower by:

1−0.9775=0.0225%

Answer 2

Answer:

Let the initial population be 100

First year it increases by 100 of 15% = 100×15/100=15

=>100+15=115

Next year it decreases by 15% of 115

=115×15/100 =69/4=17.25

=> 115-17.25 = 97.75

decrease=100-97.75=2.25

decrease % = (2.25/100)×100%=2.25%