-78.34% is the change from 531 to 115
Calculation steps:
[( 115 - 531 ) ÷ 531] x 100 = -78.34%
Formula
Percentage change = [(115 - 531) / 531] x 100
Subtract the new number by the original number
115 - 531 = -416
-416 ÷ 531 = -0.783427495291902
-0.783427495291902 x 100 = -78.34%