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.
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Answered by
1
Answer:
Decrease of
0.0225
%
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
=
.9775
P
This means the population is lower than it started with and is lower by:
1
−
0.9775
=
0.0225
%
Step-by-step explanation:
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