-86.55% is the change from 580 to 78
Calculation steps:
[( 78 - 580 ) ÷ 580] x 100 = -86.55%
Formula
Percentage change = [(78 - 580) / 580] x 100
Subtract the new number by the original number
78 - 580 = -502
-502 ÷ 580 = -0.8655172413793103
-0.8655172413793103 x 100 = -86.55%