29.57% is the change from 531 to 688
Calculation steps:
[( 688 - 531 ) ÷ 531] x 100 = 29.57%
Formula
Percentage change = [(688 - 531) / 531] x 100
Subtract the new number by the original number
688 - 531 = 157
157 ÷ 531 = 0.295668549905838
0.295668549905838 x 100 = 29.57%