20.68% is the change from 643 to 776
Calculation steps:
[( 776 - 643 ) ÷ 643] x 100 = 20.68%
Formula
Percentage change = [(776 - 643) / 643] x 100
Subtract the new number by the original number
776 - 643 = 133
133 ÷ 643 = 0.20684292379471228
0.20684292379471228 x 100 = 20.68%