Liana, let's say they do 2 houses a day. How many days would it take to do 6? 3, right, because 6 ÷ 2 = 3.
Instead, we have 6 ÷ 3/4. Remember how to do that? We flip the 2nd fraction and multiply.
6/1 x 4/3 = 24/3 = 8.
It will take 8 days to paint 6 houses.
Hope this helps!