12.5% is the change from 568 to 639
Calculation steps:
[( 639 - 568 ) ÷ 568] x 100 = 12.5%
Formula
Percentage change = [(639 - 568) / 568] x 100
Subtract the new number by the original number
639 - 568 = 71
71 ÷ 568 = 0.125
0.125 x 100 = 12.5%
Example