33.59% is the change from 515 to 688
Calculation steps:
[( 688 - 515 ) ÷ 515] x 100 = 33.59%
Formula
Percentage change = [(688 - 515) / 515] x 100
Subtract the new number by the original number
688 - 515 = 173
173 ÷ 515 = 0.3359223300970874
0.3359223300970874 x 100 = 33.59%