For this case we have that both pizzas are the same size, we want to know who of the two ate more pizza.
For this, we compare both fractions:
[tex]\frac {1} {8} * \frac {3} {3} = \frac {3} {24}\\\frac {1} {6} * \frac {4} {4} = \frac {4} {24}[/tex]
We observed that:
[tex]\frac {4} {24}> \frac {3} {24}[/tex]
Therefore, Mark ate more pizza than Jenna
Answer:
Mark ate more pizza than Jenna
[tex]\frac {1} {6}> \frac {1} {8}[/tex]