-97.14% is the change from 280 to 8
Calculation steps:
[( 8 - 280 ) ÷ 280] x 100 = -97.14%
Formula
Percentage change = [(8 - 280) / 280] x 100
Subtract the new number by the original number
8 - 280 = -272
-272 ÷ 280 = -0.9714285714285714
-0.9714285714285714 x 100 = -97.14%