Answer :

Firstly we need to find the common denominator:

2/3 - 1/5 =
= 10/15 - 3/15 =
= 7/15

We can't simplify it so that's the result :) I hope it will help you :)
it equals 7/15 
1. find the least common multiple of the 2 denominators(bottom numbers) 
for this problem: the lcm is 15(3 times 5)
2. the fractions will now be 10/15(2/3) and 3/15(1/59
3. subtract ONLY the numerators(upper numbers)
4. 10-3=7
5. your answer will be 7/15