Joy is correct
Explanation:
Step 1 :
Given 1 cup is equal to 1/2 pints
Step 2:
Asha says 2/5 cup of milk should be used
1 cup = 1/2 pint
=> 2/5 cup = 1/2 * 2/5 = 2/10 = 1/5 pint
This is not what joy needs for the recipe. Hence Asha is not correct
Step 3:
Joy says she should be using 1 3/5 cups = 8/5 cups (converting to improper fraction
1 cup = 1/2 pint
8/5 cup = 8/5 * 1/2 = 8/10 = 4/5 pint which is the measurement required by joy for her recipe
Hence Joy is correct