-81.73% is the change from 531 to 97
Calculation steps:
[( 97 - 531 ) ÷ 531] x 100 = -81.73%
Formula
Percentage change = [(97 - 531) / 531] x 100
Subtract the new number by the original number
97 - 531 = -434
-434 ÷ 531 = -0.8173258003766478
-0.8173258003766478 x 100 = -81.73%