29.03% is the change from 496 to 640
Calculation steps:
[( 640 - 496 ) ÷ 496] x 100 = 29.03%
Formula
Percentage change = [(640 - 496) / 496] x 100
Subtract the new number by the original number
640 - 496 = 144
144 ÷ 496 = 0.2903225806451613
0.2903225806451613 x 100 = 29.03%
Example