71.27% is the change from 181 to 310
Calculation steps:
[( 310 - 181 ) ÷ 181] x 100 = 71.27%
Formula
Percentage change = [(310 - 181) / 181] x 100
Subtract the new number by the original number
310 - 181 = 129
129 ÷ 181 = 0.712707182320442
0.712707182320442 x 100 = 71.27%