-10.34% is the change from 290 to 260
Calculation steps:
[( 260 - 290 ) ÷ 290] x 100 = -10.34%
Formula
Percentage change = [(260 - 290) / 290] x 100
Subtract the new number by the original number
260 - 290 = -30
-30 ÷ 290 = -0.10344827586206896
-0.10344827586206896 x 100 = -10.34%