-86.71% is the change from 587 to 78
Calculation steps:
[( 78 - 587 ) ÷ 587] x 100 = -86.71%
Formula
Percentage change = [(78 - 587) / 587] x 100
Subtract the new number by the original number
78 - 587 = -509
-509 ÷ 587 = -0.8671209540034072
-0.8671209540034072 x 100 = -86.71%