-50.12% is the change from 423 to 211
Calculation steps:
[( 211 - 423 ) ÷ 423] x 100 = -50.12%
Formula
Percentage change = [(211 - 423) / 423] x 100
Subtract the new number by the original number
211 - 423 = -212
-212 ÷ 423 = -0.5011820330969267
-0.5011820330969267 x 100 = -50.12%