-14.2% is the change from 331 to 284
Calculation steps:
[( 284 - 331 ) ÷ 331] x 100 = -14.2%
Formula
Percentage change = [(284 - 331) / 331] x 100
Subtract the new number by the original number
284 - 331 = -47
-47 ÷ 331 = -0.1419939577039275
-0.1419939577039275 x 100 = -14.2%