17.5% is the change from 640 to 752
Calculation steps:
[( 752 - 640 ) ÷ 640] x 100 = 17.5%
Formula
Percentage change = [(752 - 640) / 640] x 100
Subtract the new number by the original number
752 - 640 = 112
112 ÷ 640 = 0.175
0.175 x 100 = 17.5%
Example