What is number ll i'm in advanced math and this is the only one i don't know. i'm in the 7th grade and in 9th grade math me.

To solve this, we simply need to substitute in the value for x, and then solve like a normal fraction problem. The easiest way to solve for this is to turn both fractions into improper fractions, subtract the smaller value from the larger value, then make it negative.

2 4/5 - 1 1/5
14/5 - 6/5
8/5
-8/5

Now, we should turn it back into a mixed number.

-1 3/5

The value of this expression is -1 3/5 or -8/5.