Question

I’ve tried 3 takes and just can’t seem to get it

Answer 1

Hello!

First you have to make the fraction have the same denominator so they are related

You can multiply the 1 and the 3 in 1/3 by 5 to get 5/15

You can multiply the 2 and the 5 in 2/5 by 3 to get 6/15

So he painted 5/15 of his room with 6/15 cans of paint.

Next you have to find out how much more of the room that needs to be painted

You can multiply 5/15 by 3 to get 1 which is his whole room

Now you do 6/15 * 3 to see how much paint he needs

This gives us the answer of 18/15 which is equal to  1 and 1/6 cans of paint

 Hope this helps!

Answer 2

1/3 and 2/5 --> what we need is a least common denominator
(1/3)x5                     (2/5)x3
5/15 and 6/15
so he needs to paint his room two more times which will make the 5/15 become 15/15 
you start with 5/15 and you need to add "5/15" two more times which will make 15/15
so you do that to 6/15 
6/15+6/15+6/15=18/15=1 3/15 or 1 1/5 cans of paint ANSWER