No it just makes a big 1.
No, two fourth is not an improper fraction because the numerator is less than the denominator if it was improper it would be four over two which you can change it into a mixed number.
5/2
The answer is fifteen over seven
It is 35/3.
It is 33/16.
9/2
12/5 or 12 over 5
2 and 1/9 is 19/9 as an improper fraction
25/7 is an improper fraction.
17/3 is an improper fraction.
19/4 is an improper fraction.
There is no improper fraction for 3/47.