81% is the change from 100 to 181
Calculation steps:
[( 181 - 100 ) ÷ 100] x 100 = 81%
Formula
Percentage change = [(181 - 100) / 100] x 100
Subtract the new number by the original number
181 - 100 = 81
81 ÷ 100 = 0.81
0.81 x 100 = 81%
Example