-27.59% is the change from 290 to 210
Calculation steps:
[( 210 - 290 ) ÷ 290] x 100 = -27.59%
Formula
Percentage change = [(210 - 290) / 290] x 100
Subtract the new number by the original number
210 - 290 = -80
-80 ÷ 290 = -0.27586206896551724
-0.27586206896551724 x 100 = -27.59%