26.92% is the change from 639 to 811
Calculation steps:
[( 811 - 639 ) ÷ 639] x 100 = 26.92%
Formula
Percentage change = [(811 - 639) / 639] x 100
Subtract the new number by the original number
811 - 639 = 172
172 ÷ 639 = 0.26917057902973396
0.26917057902973396 x 100 = 26.92%