71.82% is the change from 181 to 311
Calculation steps:
[( 311 - 181 ) ÷ 181] x 100 = 71.82%
Formula
Percentage change = [(311 - 181) / 181] x 100
Subtract the new number by the original number
311 - 181 = 130
130 ÷ 181 = 0.7182320441988951
0.7182320441988951 x 100 = 71.82%