Question

Christopher has breakfast at a cafe and the cost of his meal is $36. Because of the service, he wants to leave a 10% tip. What is his total bill including tip

Answer 1

`\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{10\% of 36}}{\left( \cfrac{10}{100} \right)36}\implies 3.6~\hfill \underset{total~bill}{\stackrel{36+3.6}{39.6}}`

Answer 2

$39.60

Explanation:

$36.00 + $3.60 = $39.60