38.28% is the change from 640 to 885
Calculation steps:
[( 885 - 640 ) ÷ 640] x 100 = 38.28%
Formula
Percentage change = [(885 - 640) / 640] x 100
Subtract the new number by the original number
885 - 640 = 245
245 ÷ 640 = 0.3828125
0.3828125 x 100 = 38.28%