36.25% is the change from 640 to 872
Calculation steps:
[( 872 - 640 ) ÷ 640] x 100 = 36.25%
Formula
Percentage change = [(872 - 640) / 640] x 100
Subtract the new number by the original number
872 - 640 = 232
232 ÷ 640 = 0.3625
0.3625 x 100 = 36.25%