Question

A zoo had 2250 visitors on Friday and 4725 on Saturday. What was the percent of increase of the number of visitors on Saturday over Friday?

Answer 1

4725 - 2250, the increase is 2475.

now if we take 2250 to be the 100%, what is 2475 off of it in percentage?

$\bf \begin{array}{ccll} amount&\%\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 2250&100\\ 2475&p \end{array}\implies \cfrac{2250}{2475}=\cfrac{100}{p}\implies p=\cfrac{2475\cdot 100}{2250}$