39.03% is the change from 638 to 887
Calculation steps:
[( 887 - 638 ) ÷ 638] x 100 = 39.03%
Formula
Percentage change = [(887 - 638) / 638] x 100
Subtract the new number by the original number
887 - 638 = 249
249 ÷ 638 = 0.390282131661442
0.390282131661442 x 100 = 39.03%