Question

John's employer increased his annual salary of $55,000 by $5,700. What percent was his raise rounded to one decimal place?10.4%0.10%0.1%10.36%

Answer 1

From the given information, we can establish the following rule of three:

$\begin{gathered} \text{ \ 55,000 ----- 100\%} \\ \text{ \ 5700 ------ x} \end{gathered}$

By cross-multiplying these quantities, we have

$x\times\text{ \ 55000=\ 5700}\times100\text{ \%}$

Then, the unknwon percentage x is given as

$x=\frac{\text{\ 5700}\times100\text{ \%}}{\text{ \ 55000}}=10.3636\text{ \%}$

Therefore, by rounding this result to the nearest tenth, the answer is: 10.4 %