# What is the increase as a percent given the price of gasoline increased from 93.9 cents to 99.9 cents?

May 16, 2017

The increase is 6.4% to 1 decimal place.

#### Explanation:

To calculate a percent change, whether it is an increase or a decrease, you use the following method:

Find the amount of change: $99.9 - 93.9 = 6 c$

Write the change as a fraction, using the STARTING amount as the denominator:

$\frac{6}{93.9}$

Make this into a percent by multiplying by 100%

100% is the same as $1$

100% = 100/100 =1

Multiplying by $1$ does not change the value of a number, only what it looks like:

6/93.9 xx 100%

= 6.3898%