41.38% is the change from 638 to 902
Calculation steps:
[( 902 - 638 ) ÷ 638] x 100 = 41.38%
Formula
Percentage change = [(902 - 638) / 638] x 100
Subtract the new number by the original number
902 - 638 = 264
264 ÷ 638 = 0.41379310344827586
0.41379310344827586 x 100 = 41.38%