Who is asking: Student
If you ask "How many 2's are in 8?" the answer is 4 since 2x4 = 8. Thus another way to ask your question is
Since you expect the answer is a fraction you can rewrite this
But you know how to multiply fractions so if you put a 5 in the numerator of the missing fraction and a 4 in the denominator, then the 5's cancel and you get 3/4. Thus
and hence the number of 3/5's in 3/4 is 5/4.