-8.72% is the change from 642 to 586
Calculation steps:
[( 586 - 642 ) ÷ 642] x 100 = -8.72%
Formula
Percentage change = [(586 - 642) / 642] x 100
Subtract the new number by the original number
586 - 642 = -56
-56 ÷ 642 = -0.08722741433021806
-0.08722741433021806 x 100 = -8.72%