-86.86% is the change from 586 to 77
Calculation steps:
[( 77 - 586 ) ÷ 586] x 100 = -86.86%
Formula
Percentage change = [(77 - 586) / 586] x 100
Subtract the new number by the original number
77 - 586 = -509
-509 ÷ 586 = -0.8686006825938567
-0.8686006825938567 x 100 = -86.86%