The fractions are attached below
(a)

We need to find out 5 times what we multiply to get 15.
5 times 3 = 15
We multiply the left hand side fraction by 3. We multiply both numerator and denominator by 3 . 6 * 3= 18


(b)

We need to find out 3 times what we multiply to get 6.
3 times 2 = 6
We multiply the left hand side fraction by 2. We multiply both numerator and denominator by 3 . We know 2*2 = 4


(C)

We need to find out 2 times what we multiply to get 16.
2 times 8 = 16
We multiply the left hand side fraction by 8. We multiply both numerator and denominator by 8 . We know 1*8 = 8


(d)

We need to find out 4 times what we multiply to get 24.
4 times 6 = 24
We multiply the left hand side fraction by 6. We multiply both numerator and denominator by 6 . We know 1*6 = 6

