-0.48% is the change from 421 to 419
Calculation steps:
[( 419 - 421 ) ÷ 421] x 100 = -0.48%
Formula
Percentage change = [(419 - 421) / 421] x 100
Subtract the new number by the original number
419 - 421 = -2
-2 ÷ 421 = -0.004750593824228029
-0.004750593824228029 x 100 = -0.48%