-2.32% is the change from 431 to 421
Calculation steps:
[( 421 - 431 ) ÷ 431] x 100 = -2.32%
Formula
Percentage change = [(421 - 431) / 431] x 100
Subtract the new number by the original number
421 - 431 = -10
-10 ÷ 431 = -0.02320185614849188
-0.02320185614849188 x 100 = -2.32%