-51.71% is the change from 439 to 212
Calculation steps:
[( 212 - 439 ) ÷ 439] x 100 = -51.71%
Formula
Percentage change = [(212 - 439) / 439] x 100
Subtract the new number by the original number
212 - 439 = -227
-227 ÷ 439 = -0.5170842824601367
-0.5170842824601367 x 100 = -51.71%