82.62% is the change from 305 to 557
Calculation steps:
[( 557 - 305 ) ÷ 305] x 100 = 82.62%
Formula
Percentage change = [(557 - 305) / 305] x 100
Subtract the new number by the original number
557 - 305 = 252
252 ÷ 305 = 0.8262295081967214
0.8262295081967214 x 100 = 82.62%