376,761 views
35 votes
35 votes
What percentage of the original bill was the tip ? Round your answer to the nearest whole percent

What percentage of the original bill was the tip ? Round your answer to the nearest-example-1
User Amexn
by
3.1k points

1 Answer

14 votes
14 votes

We can solve this question by applying the rule of three:


\begin{gathered} \text{ \$37.92 ------- 100\%} \\ \text{ \$7.08 ------- x } \end{gathered}

By cross multiplying these values, we have


\text{ \$37.92 }* x=\text{ \$7.08 }*\text{ 100\%}

since we need to isolate x, by dividing both sides by $37.92, we get


x=\frac{\text{ \$7.08}*\text{ 100\%}}{\text{ \$37.92}}

So, x is given by


x=18.67\text{ \%}

Therefore, by rounding to the nearest whole percent, the answer is 19 %

User Robert Fall
by
2.5k points