-86.35% is the change from 586 to 80
Calculation steps:
[( 80 - 586 ) ÷ 586] x 100 = -86.35%
Formula
Percentage change = [(80 - 586) / 586] x 100
Subtract the new number by the original number
80 - 586 = -506
-506 ÷ 586 = -0.863481228668942
-0.863481228668942 x 100 = -86.35%