-50.8% is the change from 439 to 216
Calculation steps:
[( 216 - 439 ) ÷ 439] x 100 = -50.8%
Formula
Percentage change = [(216 - 439) / 439] x 100
Subtract the new number by the original number
216 - 439 = -223
-223 ÷ 439 = -0.5079726651480638
-0.5079726651480638 x 100 = -50.8%