-88.18% is the change from 990 to 117
Calculation steps:
[( 117 - 990 ) ÷ 990] x 100 = -88.18%
Formula
Percentage change = [(117 - 990) / 990] x 100
Subtract the new number by the original number
117 - 990 = -873
-873 ÷ 990 = -0.8818181818181818
-0.8818181818181818 x 100 = -88.18%