-99.53% is the change from 423 to 2
Calculation steps:
[( 2 - 423 ) ÷ 423] x 100 = -99.53%
Formula
Percentage change = [(2 - 423) / 423] x 100
Subtract the new number by the original number
2 - 423 = -421
-421 ÷ 423 = -0.9952718676122931
-0.9952718676122931 x 100 = -99.53%