12.68% is the change from 568 to 640
Calculation steps:
[( 640 - 568 ) ÷ 568] x 100 = 12.68%
Formula
Percentage change = [(640 - 568) / 568] x 100
Subtract the new number by the original number
640 - 568 = 72
72 ÷ 568 = 0.1267605633802817
0.1267605633802817 x 100 = 12.68%