-86.6% is the change from 582 to 78
Calculation steps:
[( 78 - 582 ) ÷ 582] x 100 = -86.6%
Formula
Percentage change = [(78 - 582) / 582] x 100
Subtract the new number by the original number
78 - 582 = -504
-504 ÷ 582 = -0.865979381443299
-0.865979381443299 x 100 = -86.6%