-85.15% is the change from 579 to 86
Calculation steps:
[( 86 - 579 ) ÷ 579] x 100 = -85.15%
Formula
Percentage change = [(86 - 579) / 579] x 100
Subtract the new number by the original number
86 - 579 = -493
-493 ÷ 579 = -0.8514680483592401
-0.8514680483592401 x 100 = -85.15%