37.38% is the change from 420 to 577
Calculation steps:
[( 577 - 420 ) ÷ 420] x 100 = 37.38%
Formula
Percentage change = [(577 - 420) / 420] x 100
Subtract the new number by the original number
577 - 420 = 157
157 ÷ 420 = 0.3738095238095238
0.3738095238095238 x 100 = 37.38%