30.23% is the change from 665 to 866
Calculation steps:
[( 866 - 665 ) ÷ 665] x 100 = 30.23%
Formula
Percentage change = [(866 - 665) / 665] x 100
Subtract the new number by the original number
866 - 665 = 201
201 ÷ 665 = 0.3022556390977444
0.3022556390977444 x 100 = 30.23%