-88.09% is the change from 638 to 76
Calculation steps:
[( 76 - 638 ) ÷ 638] x 100 = -88.09%
Formula
Percentage change = [(76 - 638) / 638] x 100
Subtract the new number by the original number
76 - 638 = -562
-562 ÷ 638 = -0.8808777429467085
-0.8808777429467085 x 100 = -88.09%