## Basic College Mathematics (10th Edition)

$\displaystyle \frac{increase~in~salary~(part)}{last~year's~salary~(whole)}=\frac{percent~increase~(unknown)}{100}$
To figure out the salary percent increase, we would set up the fraction like so: $\displaystyle \frac{increase~in~salary}{last~year's~salary}=\frac{percent~increase}{100}$ increase in salary: the "part" (difference between this year's salary and last year's salary). last year's salary: the "whole" that we divide by. percent increase: right side numerator (our unknown). We would then cross-multiply and solve the for unknown (percent increase).