Question

Last year Christine open an investment account with $8800 at the end of the year the amount in the account had increased by 22.5% how much is the increase in dollars

Answer 1

well, how much is 22.5% of 8800?

`\begin{array}ll \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{22.5\% of 8800}}{\left( \cfrac{22.5}{100} \right)8800}\implies \text{\LARGE 1980}`