234.57% is the change from 81 to 271
Calculation steps:
[( 271 - 81 ) ÷ 81] x 100 = 234.57%
Formula
Percentage change = [(271 - 81) / 81] x 100
Subtract the new number by the original number
271 - 81 = 190
190 ÷ 81 = 2.345679012345679
2.345679012345679 x 100 = 234.57%