Answer:
Mr.Strand washed the most, and 7/20ths more laundry are left.
Step-by-step explanation:
In order to find what the larger amount actually is, we'll need to convert both the fractions into something comparable by using the same denominator. We can do this by multiplying 1/4 by 5/5 for the other denominator, and multiplying 2/5ths by 4/4. You'll then get 8/20, which is how much Mr.Strand washed, and 5/20, which is how much his son washed. We can conclude that since 8 is greater than 5, Mr. Strand washed the most. Now we add up both 8 and 5 to figure out how many things they washed together. Â They washed 13 together, and the denominator is how much they need to wash total, we then subtract 13 from 20 to get 7. They need to wash 7 more things.