32.05% is the change from 521 to 688
Calculation steps:
[( 688 - 521 ) ÷ 521] x 100 = 32.05%
Formula
Percentage change = [(688 - 521) / 521] x 100
Subtract the new number by the original number
688 - 521 = 167
167 ÷ 521 = 0.32053742802303264
0.32053742802303264 x 100 = 32.05%