50.83% is the change from 421 to 635
Calculation steps:
[( 635 - 421 ) ÷ 421] x 100 = 50.83%
Formula
Percentage change = [(635 - 421) / 421] x 100
Subtract the new number by the original number
635 - 421 = 214
214 ÷ 421 = 0.5083135391923991
0.5083135391923991 x 100 = 50.83%