Answer:
Multiply by the inverse.
Answer: 45
Explanation:
(15)/(1/3) is the same thing as multiplying the top (numerator), by the inverse of the bottom (denominator).
So we have the following:

Taking the inverse means flipping the fraction. The inverse of
is
. So we can keep the top, and multiply by the inverse.
X
= 15 x 3 = 45.
Does this make sense?