Question

In 2009, Mariana paid $5,160 in federal income tax. In 2010, she paid 70% more than in 2009. How much did Mariana pay in 2010?

finishing. What is the percent of decrease in the number of finishers?

Answer 1

3,612

Explanation:

70% of 5,160

0.70•5,160= 3612

Answer 2

`\begin{array}c \cline{1-1} \textit{\textit{\LARGE a}\% of \textit{\LARGE b}}\\ \cline{1-1} \\ \left( \cfrac{\textit{\LARGE a}}{100} \right)\cdot \textit{\LARGE b} \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{70\% of 5160}}{\left( \cfrac{70}{100} \right)5160}\implies 3612~\hfill \underset{for~2010}{\stackrel{5160~~ + ~~3612}{\text{\LARGE 8772}}}`