-48.69% is the change from 421 to 216
Calculation steps:
[( 216 - 421 ) ÷ 421] x 100 = -48.69%
Formula
Percentage change = [(216 - 421) / 421] x 100
Subtract the new number by the original number
216 - 421 = -205
-205 ÷ 421 = -0.48693586698337293
-0.48693586698337293 x 100 = -48.69%