Question

The sales tax rate is 7.5%. What is the tax on a $12.40 purchase?

Answer 1

$0.93

Explanation:

1) Turn 7.5% into a decimal which is 0.075

2) Multiply :

0.075 * 12.40 = $0.93 tax on the purchase

Second Part if you need to add :

1) Add :

$12.40 + 0.93 = $13.33

Answer 2

`\begin{array} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{7.5\% of 12.40}}{\left( \cfrac{7.5}{100} \right)12.40}\implies 0.93`