9.79% is the change from 582 to 639
Calculation steps:
[( 639 - 582 ) ÷ 582] x 100 = 9.79%
Formula
Percentage change = [(639 - 582) / 582] x 100
Subtract the new number by the original number
639 - 582 = 57
57 ÷ 582 = 0.0979381443298969
0.0979381443298969 x 100 = 9.79%