-8.84% is the change from 645 to 588
Calculation steps:
[( 588 - 645 ) ÷ 645] x 100 = -8.84%
Formula
Percentage change = [(588 - 645) / 645] x 100
Subtract the new number by the original number
588 - 645 = -57
-57 ÷ 645 = -0.08837209302325581
-0.08837209302325581 x 100 = -8.84%