-96.86% is the change from 287 to 9
Calculation steps:
[( 9 - 287 ) ÷ 287] x 100 = -96.86%
Formula
Percentage change = [(9 - 287) / 287] x 100
Subtract the new number by the original number
9 - 287 = -278
-278 ÷ 287 = -0.9686411149825784
-0.9686411149825784 x 100 = -96.86%