-86.69% is the change from 586 to 78
Calculation steps:
[( 78 - 586 ) ÷ 586] x 100 = -86.69%
Formula
Percentage change = [(78 - 586) / 586] x 100
Subtract the new number by the original number
78 - 586 = -508
-508 ÷ 586 = -0.8668941979522184
-0.8668941979522184 x 100 = -86.69%