Irene R. answered 01/08/20
BS in Mechanical Engineering and Certified math teacher for 13 years
Since the two numbers in this question have dufferent denominators, you will need to dtermiine a common denominator before subtracting.
First, 1 and 1/3 is equivalent to 4/3. Then the least common denominator for thirds and fifths is fifteenths.
(Solve 4/3 - 3/5 )
4/3 = 20/15
3/5 = 9/15
Then 20/15 - 9/15 = 11/15
Your solution is 11/15