-27.79% is the change from 331 to 239
Calculation steps:
[( 239 - 331 ) ÷ 331] x 100 = -27.79%
Formula
Percentage change = [(239 - 331) / 331] x 100
Subtract the new number by the original number
239 - 331 = -92
-92 ÷ 331 = -0.27794561933534745
-0.27794561933534745 x 100 = -27.79%