-8.36% is the change from 311 to 285
Calculation steps:
[( 285 - 311 ) ÷ 311] x 100 = -8.36%
Formula
Percentage change = [(285 - 311) / 311] x 100
Subtract the new number by the original number
285 - 311 = -26
-26 ÷ 311 = -0.08360128617363344
-0.08360128617363344 x 100 = -8.36%