Question

Jin bought a book that cost $5.60if the tax rate is 70% how much tax did he pay?

Answer 1

`\bf \begin{array}ll\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{70\% of 5.60}}{\left( \cfrac{70}{100} \right)5.60}\implies 3.92`