We have this expression:
[tex]\frac{15}{y}[/tex]
Let's substitute y = 1/4 into this expression.
[tex]\frac{15}{\frac{1}{4}}[/tex]
Multiply the top and bottom by 4/1 in order to get rid of the double fractions.
[tex]15(\frac{4}{1})=60[/tex]
The answer to this problem is C) 60.
