-9.6% is the change from 646 to 584
Calculation steps:
[( 584 - 646 ) ÷ 646] x 100 = -9.6%
Formula
Percentage change = [(584 - 646) / 646] x 100
Subtract the new number by the original number
584 - 646 = -62
-62 ÷ 646 = -0.09597523219814241
-0.09597523219814241 x 100 = -9.6%