9.9% is the change from 586 to 644
Calculation steps:
[( 644 - 586 ) ÷ 586] x 100 = 9.9%
Formula
Percentage change = [(644 - 586) / 586] x 100
Subtract the new number by the original number
644 - 586 = 58
58 ÷ 586 = 0.09897610921501707
0.09897610921501707 x 100 = 9.9%