-88.24% is the change from 638 to 75
Calculation steps:
[( 75 - 638 ) ÷ 638] x 100 = -88.24%
Formula
Percentage change = [(75 - 638) / 638] x 100
Subtract the new number by the original number
75 - 638 = -563
-563 ÷ 638 = -0.8824451410658307
-0.8824451410658307 x 100 = -88.24%