40.39% is the change from 666 to 935
Calculation steps:
[( 935 - 666 ) ÷ 666] x 100 = 40.39%
Formula
Percentage change = [(935 - 666) / 666] x 100
Subtract the new number by the original number
935 - 666 = 269
269 ÷ 666 = 0.4039039039039039
0.4039039039039039 x 100 = 40.39%