31.75% is the change from 126 to 166
Calculation steps:
[( 166 - 126 ) ÷ 126] x 100 = 31.75%
Formula
Percentage change = [(166 - 126) / 126] x 100
Subtract the new number by the original number
166 - 126 = 40
40 ÷ 126 = 0.31746031746031744
0.31746031746031744 x 100 = 31.75%