-28.07% is the change from 431 to 310
Calculation steps:
[( 310 - 431 ) ÷ 431] x 100 = -28.07%
Formula
Percentage change = [(310 - 431) / 431] x 100
Subtract the new number by the original number
310 - 431 = -121
-121 ÷ 431 = -0.28074245939675174
-0.28074245939675174 x 100 = -28.07%