-86.63% is the change from 531 to 71
Calculation steps:
[( 71 - 531 ) ÷ 531] x 100 = -86.63%
Formula
Percentage change = [(71 - 531) / 531] x 100
Subtract the new number by the original number
71 - 531 = -460
-460 ÷ 531 = -0.8662900188323918
-0.8662900188323918 x 100 = -86.63%