HELP ILL GIVE POINTS AND BRAINLIEST Find the percent decrease. Where necessary round to the nearest tenth of a percent

3. from 64 to 24

4. from 6.5 to 4.8

5. The average cost of a gallon of gasoline was $1.29 in 1997 and $1.12 in 1998. Find the percent of decrease.

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.

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