-96.59% is the change from 879 to 30
Calculation steps:
[( 30 - 879 ) ÷ 879] x 100 = -96.59%
Formula
Percentage change = [(30 - 879) / 879] x 100
Subtract the new number by the original number
30 - 879 = -849
-849 ÷ 879 = -0.9658703071672355
-0.9658703071672355 x 100 = -96.59%