-27.84% is the change from 431 to 311
Calculation steps:
[( 311 - 431 ) ÷ 431] x 100 = -27.84%
Formula
Percentage change = [(311 - 431) / 431] x 100
Subtract the new number by the original number
311 - 431 = -120
-120 ÷ 431 = -0.27842227378190254
-0.27842227378190254 x 100 = -27.84%