Question

Original number = 35. New number = 49. What is the percent change and state if it was an increase or decrease.

Answer 1

$\begin{array}{ccc}35&-&100\%\\49&-&p\%\end{array}\qquad\text{cross multiply}\\\\35p=(49)(100)\\\\35p=4,900\qquad\text{divide both sides by 35}\\\\p=140(\%)\\\\140\%-100\%=40\%\\\\Answer:\ Increase\ 40\%.$