Answer:
half
Explanation:
basically you have to get a common denominator for both fractions to add them. so 1/3 can be turned into 2/6 because 6 is divisible by three. 3 can go into 6 two times so you multiply the numerator by 2 as well and you get 2/6. 2/6 plus 1/6 is 3/6 which is one half. so you have one half of the roll used and one half of one whole leaves another one half. so you have one half of the roll left.