if mrs. Rios washed 1/4 f her laundry and her son washed 2/5 so Who washed most of the laundry? How much of the laundry still needs to be washed?

7/20 still needs to be washed.

Step-by-step explanation:

You will need to find the lowest common multiple and add the two fractions together and subtract that sum from 1. The 1 represents the total amount of laundry and the sum you will find represents the fraction of laundry that Mrs. Rios and her son have already washed combined.    

1/4 + 2/5

= 5/20 + 8/20

= 13/20

1 - 13/20

= 20/20 - 13/20

= 7/20

first one is a: renaming a fraction. second one is c: de-c

step-by-step explanation:

my explanation is that these were the answers on edg : )