48.75% is the change from 640 to 952
Calculation steps:
[( 952 - 640 ) ÷ 640] x 100 = 48.75%
Formula
Percentage change = [(952 - 640) / 640] x 100
Subtract the new number by the original number
952 - 640 = 312
312 ÷ 640 = 0.4875
0.4875 x 100 = 48.75%