185.19% is the change from 81 to 231
Calculation steps:
[( 231 - 81 ) ÷ 81] x 100 = 185.19%
Formula
Percentage change = [(231 - 81) / 81] x 100
Subtract the new number by the original number
231 - 81 = 150
150 ÷ 81 = 1.8518518518518519
1.8518518518518519 x 100 = 185.19%