31.81% is the change from 657 to 866
Calculation steps:
[( 866 - 657 ) ÷ 657] x 100 = 31.81%
Formula
Percentage change = [(866 - 657) / 657] x 100
Subtract the new number by the original number
866 - 657 = 209
209 ÷ 657 = 0.3181126331811263
0.3181126331811263 x 100 = 31.81%