4.91% is the change from 591 to 620
Calculation steps:
[( 620 - 591 ) ÷ 591] x 100 = 4.91%
Formula
Percentage change = [(620 - 591) / 591] x 100
Subtract the new number by the original number
620 - 591 = 29
29 ÷ 591 = 0.049069373942470386
0.049069373942470386 x 100 = 4.91%