Question

Jullas monthly gasoline bill dropped from 33.57 last month, to 30.83 this month. Find thepercent decrease, Round to the nearest whole percent.

Answer 1

To determine the percent of decrease we use the following formula:

`\frac{Old\text{ value-New value}}{Old\text{ Value}}*100.`

Substituting:

`\begin{gathered} Old\text{ value=33.57,} \\ New\text{ value=30.83} \end{gathered}`

in the formula, we get:

`(33.57-30.83)/(33.57)*100.`

Simplifying the above result, we get:

`\approx8\%.`

Answer:

`\begin{equation*} 8\%. \end{equation*}`