Question

Eleven bought a new bike for $90. The sales tax is 5 1/2. How much does Eleven have to

pay in total?

Answer 1

well, hmmm 5 and 1/2 or just 5.5%, let's find how much that is and add it to $90.

`\begin{array}c \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{5.5\% of 90}}{\left( \cfrac{5.5}{100} \right)90}\implies 4.95~\hfill \underset{total~price}{\stackrel{90~~ + ~~4.95}{94.95}}`