7.21% is the change from 596 to 639
Calculation steps:
[( 639 - 596 ) ÷ 596] x 100 = 7.21%
Formula
Percentage change = [(639 - 596) / 596] x 100
Subtract the new number by the original number
639 - 596 = 43
43 ÷ 596 = 0.07214765100671142
0.07214765100671142 x 100 = 7.21%