30.33% is the change from 666 to 868
Calculation steps:
[( 868 - 666 ) ÷ 666] x 100 = 30.33%
Formula
Percentage change = [(868 - 666) / 666] x 100
Subtract the new number by the original number
868 - 666 = 202
202 ÷ 666 = 0.3033033033033033
0.3033033033033033 x 100 = 30.33%