-86.62% is the change from 583 to 78
Calculation steps:
[( 78 - 583 ) ÷ 583] x 100 = -86.62%
Formula
Percentage change = [(78 - 583) / 583] x 100
Subtract the new number by the original number
78 - 583 = -505
-505 ÷ 583 = -0.8662092624356775
-0.8662092624356775 x 100 = -86.62%