Answer:
7/15
Step-by-step explanation:
If we're seeing how much pizza they both ate, we would add them together.
[tex]\frac{1}{3}+\frac{1}{5}[/tex]
Find the common denominator
[tex]\frac{5}{15}+ \frac{3}{15}[/tex]
add
[tex]\frac{7}{15}[/tex]
7/15 of the pizza was eaten
