-86.16% is the change from 990 to 137
Calculation steps:
[( 137 - 990 ) ÷ 990] x 100 = -86.16%
Formula
Percentage change = [(137 - 990) / 990] x 100
Subtract the new number by the original number
137 - 990 = -853
-853 ÷ 990 = -0.8616161616161616
-0.8616161616161616 x 100 = -86.16%