-88.28% is the change from 290 to 34
Calculation steps:
[( 34 - 290 ) ÷ 290] x 100 = -88.28%
Formula
Percentage change = [(34 - 290) / 290] x 100
Subtract the new number by the original number
34 - 290 = -256
-256 ÷ 290 = -0.8827586206896552
-0.8827586206896552 x 100 = -88.28%