10.34% is the change from 580 to 640
Calculation steps:
[( 640 - 580 ) ÷ 580] x 100 = 10.34%
Formula
Percentage change = [(640 - 580) / 580] x 100
Subtract the new number by the original number
640 - 580 = 60
60 ÷ 580 = 0.10344827586206896
0.10344827586206896 x 100 = 10.34%