Each problem gives an improper fraction - top heavier than the bottom - and the student rewrites it as a whole number and a proper fraction. 7/4 becomes 1 3/4; 11/3 becomes 3 2/3.
Divide the numerator by the denominator: the quotient is the whole number, the remainder is the new numerator, and the denominator stays the same. Every fraction on this page is greater than one, so there is always a whole part to pull out.
One where the numerator is bigger than the denominator, like 9/4. It is a perfectly valid fraction - it just has a whole number hidden inside it.
Divide the top by the bottom. 9 / 4 is 2 remainder 1, so 9/4 is 2 1/4.
Not on this page - it is improper to mixed throughout. Converting a mixed number to an improper fraction is the reverse skill and is a good follow-up.
Fourth and fifth grade, once dividing with remainders is solid.