-97.24% is the change from 290 to 8
Calculation steps:
[( 8 - 290 ) ÷ 290] x 100 = -97.24%
Formula
Percentage change = [(8 - 290) / 290] x 100
Subtract the new number by the original number
8 - 290 = -282
-282 ÷ 290 = -0.9724137931034482
-0.9724137931034482 x 100 = -97.24%