-98.98% is the change from 879 to 9
Calculation steps:
[( 9 - 879 ) ÷ 879] x 100 = -98.98%
Formula
Percentage change = [(9 - 879) / 879] x 100
Subtract the new number by the original number
9 - 879 = -870
-870 ÷ 879 = -0.9897610921501706
-0.9897610921501706 x 100 = -98.98%