-8.62% is the change from 638 to 583
Calculation steps:
[( 583 - 638 ) ÷ 638] x 100 = -8.62%
Formula
Percentage change = [(583 - 638) / 638] x 100
Subtract the new number by the original number
583 - 638 = -55
-55 ÷ 638 = -0.08620689655172414
-0.08620689655172414 x 100 = -8.62%