-23.15% is the change from 311 to 239
Calculation steps:
[( 239 - 311 ) ÷ 311] x 100 = -23.15%
Formula
Percentage change = [(239 - 311) / 311] x 100
Subtract the new number by the original number
239 - 311 = -72
-72 ÷ 311 = -0.2315112540192926
-0.2315112540192926 x 100 = -23.15%