9.59% is the change from 584 to 640
Calculation steps:
[( 640 - 584 ) ÷ 584] x 100 = 9.59%
Formula
Percentage change = [(640 - 584) / 584] x 100
Subtract the new number by the original number
640 - 584 = 56
56 ÷ 584 = 0.0958904109589041
0.0958904109589041 x 100 = 9.59%