27.39% is the change from 639 to 814
Calculation steps:
[( 814 - 639 ) ÷ 639] x 100 = 27.39%
Formula
Percentage change = [(814 - 639) / 639] x 100
Subtract the new number by the original number
814 - 639 = 175
175 ÷ 639 = 0.27386541471048514
0.27386541471048514 x 100 = 27.39%