81.55% is the change from 271 to 492
Calculation steps:
[( 492 - 271 ) ÷ 271] x 100 = 81.55%
Formula
Percentage change = [(492 - 271) / 271] x 100
Subtract the new number by the original number
492 - 271 = 221
221 ÷ 271 = 0.8154981549815498
0.8154981549815498 x 100 = 81.55%