-9.79% is the change from 286 to 258
Calculation steps:
[( 258 - 286 ) ÷ 286] x 100 = -9.79%
Formula
Percentage change = [(258 - 286) / 286] x 100
Subtract the new number by the original number
258 - 286 = -28
-28 ÷ 286 = -0.0979020979020979
-0.0979020979020979 x 100 = -9.79%