Yes.
No, it's improper.
no it is an improper fraction
23/9 is an improper fraction
9 / (3/7) = 9 * (7/3) = 21 which is an integer, not an improper fraction.
2 and 1/9 is 19/9 as an improper fraction
9/7 is already an improper fraction!
7 over 9 and 8 over 9.
2 1/4
The mixed number 2 1/4 (two and one over four) = 9/4 (nine over four) as an improper fraction.
25/7 is an improper fraction.
17/3 is an improper fraction.
19/4 is an improper fraction.