-88.53% is the change from 645 to 74
Calculation steps:
[( 74 - 645 ) ÷ 645] x 100 = -88.53%
Formula
Percentage change = [(74 - 645) / 645] x 100
Subtract the new number by the original number
74 - 645 = -571
-571 ÷ 645 = -0.8852713178294573
-0.8852713178294573 x 100 = -88.53%