-74.92% is the change from 638 to 160
Calculation steps:
[( 160 - 638 ) ÷ 638] x 100 = -74.92%
Formula
Percentage change = [(160 - 638) / 638] x 100
Subtract the new number by the original number
160 - 638 = -478
-478 ÷ 638 = -0.7492163009404389
-0.7492163009404389 x 100 = -74.92%