32.62% is the change from 420 to 557
Calculation steps:
[( 557 - 420 ) ÷ 420] x 100 = 32.62%
Formula
Percentage change = [(557 - 420) / 420] x 100
Subtract the new number by the original number
557 - 420 = 137
137 ÷ 420 = 0.3261904761904762
0.3261904761904762 x 100 = 32.62%