42.14% is the change from 420 to 597
Calculation steps:
[( 597 - 420 ) ÷ 420] x 100 = 42.14%
Formula
Percentage change = [(597 - 420) / 420] x 100
Subtract the new number by the original number
597 - 420 = 177
177 ÷ 420 = 0.42142857142857143
0.42142857142857143 x 100 = 42.14%