6.35% is the change from 583 to 620
Calculation steps:
[( 620 - 583 ) ÷ 583] x 100 = 6.35%
Formula
Percentage change = [(620 - 583) / 583] x 100
Subtract the new number by the original number
620 - 583 = 37
37 ÷ 583 = 0.0634648370497427
0.0634648370497427 x 100 = 6.35%