-23.32% is the change from 832 to 638
Calculation steps:
[( 638 - 832 ) ÷ 832] x 100 = -23.32%
Formula
Percentage change = [(638 - 832) / 832] x 100
Subtract the new number by the original number
638 - 832 = -194
-194 ÷ 832 = -0.23317307692307693
-0.23317307692307693 x 100 = -23.32%