-10% is the change from 290 to 261
Calculation steps:
[( 261 - 290 ) ÷ 290] x 100 = -10%
Formula
Percentage change = [(261 - 290) / 290] x 100
Subtract the new number by the original number
261 - 290 = -29
-29 ÷ 290 = -0.1
-0.1 x 100 = -10%
Example