172.84% is the change from 81 to 221
Calculation steps:
[( 221 - 81 ) ÷ 81] x 100 = 172.84%
Formula
Percentage change = [(221 - 81) / 81] x 100
Subtract the new number by the original number
221 - 81 = 140
140 ÷ 81 = 1.728395061728395
1.728395061728395 x 100 = 172.84%