Answer: [tex]\frac{1}{8}[/tex]
Step-by-step explanation:
Given
There are a total of 6 persons including billy and his 5 friends
[tex]\frac{3}{4}\ \text{of the pizza is left}[/tex]
i.e. [tex]\frac{3}{4}\ \text{of pizza must be divided among 6 friends}[/tex]
each friend gets [tex]\dfrac{\frac{3}{4}}{6}=\dfrac{3}{4\times 6}=\dfrac{1}{8}[/tex]
So, each gets [tex]\frac{1}{8}[/tex] of the whole pizza