-9.12% is the change from 285 to 259
Calculation steps:
[( 259 - 285 ) ÷ 285] x 100 = -9.12%
Formula
Percentage change = [(259 - 285) / 285] x 100
Subtract the new number by the original number
259 - 285 = -26
-26 ÷ 285 = -0.0912280701754386
-0.0912280701754386 x 100 = -9.12%