# An electric bill in May was $112.00. In June, the bill was$163.00. What is the percent of increase, rounded to the nearest tenth?

Oct 28, 2016

There was a 45.5% increase in Junes electric bill compared to Mays electric bill.

#### Explanation:

The formula for percent change over two periods of time is:

$p = \frac{N - O}{O} \cdot 100$ where $p$ is the percent change, $N$ is the new value and $O$ is the old value.

Substituting what is known gives:

$p = \frac{163 - 112}{112} \cdot 100$

$p = \frac{51}{112} \cdot 100$

$p = 0.455 \cdot 100$

$p = 45.5$