Matt has a full jar of marbles he gave Kayla 3/4 and Marbles and Kayla return 1/3 of the jars worth of Marvel's to the jar how much are the jars now full marbles

Matt has 7/12 of the jar of marbles left.

Step-by-step explanation:

In order to find this, simply subtract the 3/4 from the full jar (1) and then add 1/3. They will need common denominators to complete this operation.

1 - 3/4 + 1/3 = Amount

12/12 - 9/12 + 4/12 = Amount

7/12 = Amount