-9.58% is the change from 647 to 585
Calculation steps:
[( 585 - 647 ) ÷ 647] x 100 = -9.58%
Formula
Percentage change = [(585 - 647) / 647] x 100
Subtract the new number by the original number
585 - 647 = -62
-62 ÷ 647 = -0.09582689335394126
-0.09582689335394126 x 100 = -9.58%