-98.58% is the change from 423 to 6
Calculation steps:
[( 6 - 423 ) ÷ 423] x 100 = -98.58%
Formula
Percentage change = [(6 - 423) / 423] x 100
Subtract the new number by the original number
6 - 423 = -417
-417 ÷ 423 = -0.9858156028368794
-0.9858156028368794 x 100 = -98.58%