-86.45% is the change from 583 to 79
Calculation steps:
[( 79 - 583 ) ÷ 583] x 100 = -86.45%
Formula
Percentage change = [(79 - 583) / 583] x 100
Subtract the new number by the original number
79 - 583 = -504
-504 ÷ 583 = -0.8644939965694682
-0.8644939965694682 x 100 = -86.45%