51.59% is the change from 409 to 620
Calculation steps:
[( 620 - 409 ) ÷ 409] x 100 = 51.59%
Formula
Percentage change = [(620 - 409) / 409] x 100
Subtract the new number by the original number
620 - 409 = 211
211 ÷ 409 = 0.5158924205378973
0.5158924205378973 x 100 = 51.59%