In order to determine how much of the pizza have left in the box, proceed as follow:
Multiply 2/3 by 2/5:
[tex]\frac{2}{3}\cdot\frac{2}{5}=\frac{4}{15}[/tex]It means that you sent 4/15 of the pizza you intially have.
Now, subtract 4/15 to 2/5 to determine the pizza left in the box:
[tex]\frac{2}{5}-\frac{4}{15}=\frac{30-20}{75}=\frac{10}{75}=\frac{2}{15}[/tex]Hence, the pizza in the box is 2/15 of the pizza of the party
