-17.79% is the change from 281 to 231
Calculation steps:
[( 231 - 281 ) ÷ 281] x 100 = -17.79%
Formula
Percentage change = [(231 - 281) / 281] x 100
Subtract the new number by the original number
231 - 281 = -50
-50 ÷ 281 = -0.17793594306049823
-0.17793594306049823 x 100 = -17.79%