-33.05% is the change from 953 to 638
Calculation steps:
[( 638 - 953 ) ÷ 953] x 100 = -33.05%
Formula
Percentage change = [(638 - 953) / 953] x 100
Subtract the new number by the original number
638 - 953 = -315
-315 ÷ 953 = -0.3305351521511018
-0.3305351521511018 x 100 = -33.05%