-15.11% is the change from 331 to 281
Calculation steps:
[( 281 - 331 ) ÷ 331] x 100 = -15.11%
Formula
Percentage change = [(281 - 331) / 331] x 100
Subtract the new number by the original number
281 - 331 = -50
-50 ÷ 331 = -0.1510574018126888
-0.1510574018126888 x 100 = -15.11%