is 3/4 + 2/5 = 9/15or 3/5 or both ?

Answer 1

3/4 + 2/5 = 15/20 + 8/20 = 23/20 = 2 3/20

Answer 2

3/4 + 2/5
you will need a common denominator, which is 20
so ..
3/4 + 2/5
= 15/20 + 8/20
= 23/20

I have no clue how you got your answers