-50.06% is the change from 879 to 439
Calculation steps:
[( 439 - 879 ) ÷ 879] x 100 = -50.06%
Formula
Percentage change = [(439 - 879) / 879] x 100
Subtract the new number by the original number
439 - 879 = -440
-440 ÷ 879 = -0.5005688282138794
-0.5005688282138794 x 100 = -50.06%