-9.02% is the change from 643 to 585
Calculation steps:
[( 585 - 643 ) ÷ 643] x 100 = -9.02%
Formula
Percentage change = [(585 - 643) / 643] x 100
Subtract the new number by the original number
585 - 643 = -58
-58 ÷ 643 = -0.09020217729393468
-0.09020217729393468 x 100 = -9.02%