-77.22% is the change from 439 to 100
Calculation steps:
[( 100 - 439 ) ÷ 439] x 100 = -77.22%
Formula
Percentage change = [(100 - 439) / 439] x 100
Subtract the new number by the original number
100 - 439 = -339
-339 ÷ 439 = -0.7722095671981777
-0.7722095671981777 x 100 = -77.22%