-8.29% is the change from 639 to 586
Calculation steps:
[( 586 - 639 ) ÷ 639] x 100 = -8.29%
Formula
Percentage change = [(586 - 639) / 639] x 100
Subtract the new number by the original number
586 - 639 = -53
-53 ÷ 639 = -0.08294209702660407
-0.08294209702660407 x 100 = -8.29%