81.33% is the change from 166 to 301
Calculation steps:
[( 301 - 166 ) ÷ 166] x 100 = 81.33%
Formula
Percentage change = [(301 - 166) / 166] x 100
Subtract the new number by the original number
301 - 166 = 135
135 ÷ 166 = 0.8132530120481928
0.8132530120481928 x 100 = 81.33%