22.1% is the change from 638 to 779
Calculation steps:
[( 779 - 638 ) ÷ 638] x 100 = 22.1%
Formula
Percentage change = [(779 - 638) / 638] x 100
Subtract the new number by the original number
779 - 638 = 141
141 ÷ 638 = 0.22100313479623823
0.22100313479623823 x 100 = 22.1%