-97.54% is the change from 285 to 7
Calculation steps:
[( 7 - 285 ) ÷ 285] x 100 = -97.54%
Formula
Percentage change = [(7 - 285) / 285] x 100
Subtract the new number by the original number
7 - 285 = -278
-278 ÷ 285 = -0.9754385964912281
-0.9754385964912281 x 100 = -97.54%