211.11% is the change from 81 to 252
Calculation steps:
[( 252 - 81 ) ÷ 81] x 100 = 211.11%
Formula
Percentage change = [(252 - 81) / 81] x 100
Subtract the new number by the original number
252 - 81 = 171
171 ÷ 81 = 2.111111111111111
2.111111111111111 x 100 = 211.11%