-13.9% is the change from 331 to 285
Calculation steps:
[( 285 - 331 ) ÷ 331] x 100 = -13.9%
Formula
Percentage change = [(285 - 331) / 331] x 100
Subtract the new number by the original number
285 - 331 = -46
-46 ÷ 331 = -0.13897280966767372
-0.13897280966767372 x 100 = -13.9%