-50.34% is the change from 439 to 218
Calculation steps:
[( 218 - 439 ) ÷ 439] x 100 = -50.34%
Formula
Percentage change = [(218 - 439) / 439] x 100
Subtract the new number by the original number
218 - 439 = -221
-221 ÷ 439 = -0.5034168564920274
-0.5034168564920274 x 100 = -50.34%