-9.51% is the change from 431 to 390
Calculation steps:
[( 390 - 431 ) ÷ 431] x 100 = -9.51%
Formula
Percentage change = [(390 - 431) / 431] x 100
Subtract the new number by the original number
390 - 431 = -41
-41 ÷ 431 = -0.0951276102088167
-0.0951276102088167 x 100 = -9.51%