-12.02% is the change from 998 to 878
Calculation steps:
[( 878 - 998 ) ÷ 998] x 100 = -12.02%
Formula
Percentage change = [(878 - 998) / 998] x 100
Subtract the new number by the original number
878 - 998 = -120
-120 ÷ 998 = -0.12024048096192384
-0.12024048096192384 x 100 = -12.02%