-8.98% is the change from 646 to 588
Calculation steps:
[( 588 - 646 ) ÷ 646] x 100 = -8.98%
Formula
Percentage change = [(588 - 646) / 646] x 100
Subtract the new number by the original number
588 - 646 = -58
-58 ÷ 646 = -0.08978328173374613
-0.08978328173374613 x 100 = -8.98%