Answer:
lbs
Explanation:
First of all find out how much Sanika bought:
Sanika bought 1/2lb less than Anna (2 3/5lbs)
so we first convert 1/2 to fifths which is: 2.5/5
Now we subtract that half from Anna's amount to find out how much Sanika has

Sanika has
lbs of grapes
Now we add them up to find how many pounds of grapes did they buy in all
Anna's + Sanika's =
?
add the whole numbers:

add the fractions:

and now we add both of those values from above ^^
and we get:

or in tenths (to not have a decimal as a numerator:
