How do you add #3 1/3 + 4 + 2/5#?
This type you have to convert to improper fraction type in order to continue with algebraic operations.
The way you can convert it is shown in the picture in the attachment.
The denominator of mixed number fraction will be also the denominator of improper one.
Then rewrite the task:
Find the least common multiple (LCM) = 15