Ricardo picked 3/1/2 pints of strawberries and used 4/5 of them to make jam. How many pints of strawberries did he use for the jam? Write the answer as a mixed number in simplest form.
To add the fractions 3/1/2 and 4/5, we need to find a common denominator. The least common multiple of 2 and 5 is 10.
Converting the fractions to have a denominator of 10:
3/1/2 = 3/1 x 5/5 = 15/5
4/5 = 8/10
Now we can add the fractions:
15/5 + 8/10 = 30/10 + 8/10 = 38/10
Simplifying the fraction, we get:
38/10 = 3 8/10 = 3 4/5
Therefore, Ricardo used 3 4/5 pints of strawberries for the jam.