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?

Question

2475 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-10-28T22:32:55

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

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

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

Substituting what is known gives:

$p = \frac{163 - 112}{112} \cdot 100$ $p = (163 - 112) / 112 * 100$

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

$p = 0.455 \cdot 100$ $p = 0.455 * 100$

$p = 45.5$ $p = 45.5$