-49.66% is the change from 439 to 221
Calculation steps:
[( 221 - 439 ) ÷ 439] x 100 = -49.66%
Formula
Percentage change = [(221 - 439) / 439] x 100
Subtract the new number by the original number
221 - 439 = -218
-218 ÷ 439 = -0.49658314350797267
-0.49658314350797267 x 100 = -49.66%