-8.55% is the change from 643 to 588
Calculation steps:
[( 588 - 643 ) ÷ 643] x 100 = -8.55%
Formula
Percentage change = [(588 - 643) / 643] x 100
Subtract the new number by the original number
588 - 643 = -55
-55 ÷ 643 = -0.08553654743390357
-0.08553654743390357 x 100 = -8.55%