Answer:
...............................
explanation:
how to find the percent
Finding Percent Increase and Percent Decrease
LEARNING OUTCOMES
Find percent increase given two values
Find percent decrease given two values
People in the media often talk about how much an amount has increased or decreased over a certain period of time. They usually express this increase or decrease as a percent.
To find the percent increase, first we find the amount of increase, which is the difference between the new amount and the original amount. Then we find what percent the amount of increase is of the original amount.
FIND PERCENT INCREASE
Step 1. Find the amount of increase.
increase
=
new amount
−
original amount
Step 2. Find the percent increase as a percent of the original amount.
EXAMPLE
In
2011
, the California governor proposed raising community college fees from
$26
per unit to
$36
per unit. Find the percent increase. (Round to the nearest tenth of a percent.)
Solution
What are you asked to find? the percent increase
Choose a variable to represent it. Let
p
=
percent.
Find the amount of increase. .
Find the percent increase. The increase is what percent of the original amount?
Translate to an equation. .
Divide both sides by
26
.
10
26
=
26
p
26
Round to the nearest thousandth.
0.384
=
p
Convert to percent form.
38.4%
=
p
Write a complete sentence. The new fees represent a
38.4
%
increase over the old fees.
