37.05% is the change from 421 to 577
Calculation steps:
[( 577 - 421 ) ÷ 421] x 100 = 37.05%
Formula
Percentage change = [(577 - 421) / 421] x 100
Subtract the new number by the original number
577 - 421 = 156
156 ÷ 421 = 0.37054631828978624
0.37054631828978624 x 100 = 37.05%