-88.4% is the change from 638 to 74
Calculation steps:
[( 74 - 638 ) ÷ 638] x 100 = -88.4%
Formula
Percentage change = [(74 - 638) / 638] x 100
Subtract the new number by the original number
74 - 638 = -564
-564 ÷ 638 = -0.8840125391849529
-0.8840125391849529 x 100 = -88.4%