-88.12% is the change from 421 to 50
Calculation steps:
[( 50 - 421 ) ÷ 421] x 100 = -88.12%
Formula
Percentage change = [(50 - 421) / 421] x 100
Subtract the new number by the original number
50 - 421 = -371
-371 ÷ 421 = -0.8812351543942993
-0.8812351543942993 x 100 = -88.12%