188.89% is the change from 81 to 234
Calculation steps:
[( 234 - 81 ) ÷ 81] x 100 = 188.89%
Formula
Percentage change = [(234 - 81) / 81] x 100
Subtract the new number by the original number
234 - 81 = 153
153 ÷ 81 = 1.8888888888888888
1.8888888888888888 x 100 = 188.89%