Question

The sales tax for an item was $37.80 and the cost $420 before tax find a sales tax rate rate your answer as a percentage

Answer 1

Step 1

State the for the sales tax rate

`\frac{sales\text{ tax}}{cost\text{ of item before tax}}`

where

`\begin{gathered} \text{sales tax=\$37.80} \\ \cos t\text{ of the item before tax=\$420} \end{gathered}`

Step 2

Get the sales tax rate in percentage by substitution

`\begin{gathered} =(37.80)/(420)=0.09 \\ \text{Convert to percentage} \end{gathered}`
`\begin{gathered} 0.09*100=9^{}\text{\%} \\ \end{gathered}`