Three and three fourths ounces of peanuts can make a full jar. If two thirds is 2 2/4 then you divide 2 2/4 by two to get one third of a jar, and that is 1 1/4. Then, you multiply that by three to get three thirds, which would be 3 3/4.
Another method would be to multiply 2 2/4 times 1 1/2 which would give you the same answer
Your answer is 3 3/4