-96.91% is the change from 291 to 9
Calculation steps:
[( 9 - 291 ) ÷ 291] x 100 = -96.91%
Formula
Percentage change = [(9 - 291) / 291] x 100
Subtract the new number by the original number
9 - 291 = -282
-282 ÷ 291 = -0.9690721649484536
-0.9690721649484536 x 100 = -96.91%