-98.57% is the change from 421 to 6
Calculation steps:
[( 6 - 421 ) ÷ 421] x 100 = -98.57%
Formula
Percentage change = [(6 - 421) / 421] x 100
Subtract the new number by the original number
6 - 421 = -415
-415 ÷ 421 = -0.9857482185273159
-0.9857482185273159 x 100 = -98.57%