37.93% is the change from 638 to 880
Calculation steps:
[( 880 - 638 ) ÷ 638] x 100 = 37.93%
Formula
Percentage change = [(880 - 638) / 638] x 100
Subtract the new number by the original number
880 - 638 = 242
242 ÷ 638 = 0.3793103448275862
0.3793103448275862 x 100 = 37.93%