Mr. robinson washed 2/5 of his laundry. his son washed 1/4 of his laundry. who washed more? how much laundry still need to be washed? ( use fractions and the title of this math is fraction problem solving.)

Mr.Robinson; 27/40 i think.

Step-by-step explanation: To begin solving you have to make both of the denominators the same by multiplying 2/5 by 4 and 1/4 by 5 giving you 8/20 and 5/20. From there i'm pretty sure you just add the two fractions to get 13/40 leaving 27/40 to be washed.

1) c 2143.6 cm

2) c 113.0 m

3) a 33.5 ft

4)   d 2 cm

5) c 20 mm

6) 180 in

7) d 120 ft