-9.03% is the change from 642 to 584
Calculation steps:
[( 584 - 642 ) ÷ 642] x 100 = -9.03%
Formula
Percentage change = [(584 - 642) / 642] x 100
Subtract the new number by the original number
584 - 642 = -58
-58 ÷ 642 = -0.09034267912772585
-0.09034267912772585 x 100 = -9.03%