-85.31% is the change from 531 to 78
Calculation steps:
[( 78 - 531 ) ÷ 531] x 100 = -85.31%
Formula
Percentage change = [(78 - 531) / 531] x 100
Subtract the new number by the original number
78 - 531 = -453
-453 ÷ 531 = -0.8531073446327684
-0.8531073446327684 x 100 = -85.31%