-24.23% is the change from 421 to 319
Calculation steps:
[( 319 - 421 ) ÷ 421] x 100 = -24.23%
Formula
Percentage change = [(319 - 421) / 421] x 100
Subtract the new number by the original number
319 - 421 = -102
-102 ÷ 421 = -0.24228028503562946
-0.24228028503562946 x 100 = -24.23%