Answer:

Explanation:
6/15 + 3/10 + 3/5
Reduce the fraction
to the lowest terms by extracting and canceling out 3.

The least common multiple of 5 and 10 is 10. Convert
and
have the same denominator, add them by adding their numerators.

Add 4 and 3 to get 7.

The least common multiple of 10 and 5 is 10. Convert
and
have the same denominator, add them by adding their numerators.

Add 7 and 6 to get 13.

Then simplify to get
=

Hope it helps and have an amazing day! =D
~sunshine~