The answer is 10/3 or 3 and 1/3 jars of Guava candy. You get this answer because you know how many jars of orange candy you have, and since you only need to know how many jars you multiply 5 by 2/3 for the fraction 10/3 which reduces to 3 1/3. So 3 1/3 jars of guava candy.
