-37.35% is the change from 672 to 421
Calculation steps:
[( 421 - 672 ) ÷ 672] x 100 = -37.35%
Formula
Percentage change = [(421 - 672) / 672] x 100
Subtract the new number by the original number
421 - 672 = -251
-251 ÷ 672 = -0.37351190476190477
-0.37351190476190477 x 100 = -37.35%