8.12% is the change from 591 to 639
Calculation steps:
[( 639 - 591 ) ÷ 591] x 100 = 8.12%
Formula
Percentage change = [(639 - 591) / 591] x 100
Subtract the new number by the original number
639 - 591 = 48
48 ÷ 591 = 0.08121827411167512
0.08121827411167512 x 100 = 8.12%