Paulo and sergio buy a pizza.paulo eats 1/3 of the pizza and sergio eats two fifths.how much of the pizza is left over?

1 - 1/3 - 2/5 = ?

Translate into 15ths and solve.

-1/15

3/15

To determine the amount of pizza left over, we need to subtract the portions that Paulo and Sergio ate from the total amount of pizza.

First, let's calculate Paulo's portion of the pizza. If Paulo ate 1/3 of the pizza, that means he ate (1/3) * 1 = 1/3 of the whole pizza.

Next, let's calculate Sergio's portion of the pizza. If Sergio ate two-fifths of the pizza, that means he ate (2/5) * 1 = 2/5 of the whole pizza.

We can then find the total amount of pizza consumed by adding Paulo and Sergio's portions together:
(1/3) + (2/5) = (5/15) + (6/15) = 11/15.

Now, to find the remaining pizza, we need to subtract the total amount consumed from the whole pizza:
1 - 11/15 = 15/15 - 11/15 = 4/15.

Therefore, there is 4/15 of the pizza left over.