Math
posted by Karli on .
amy gets 1 hour for lunch at her job. Today she used 1/4 hour to eat and 2/5 hour to run an errand. She spent the rest of her lunch writing a letter. How many minutes did Amy spend writing a letter? Please show me how to get the answer..Thanks.

1/4 * 60 = 15 minutes
2/5 * 60 = 24 minutes
15 + 24 = 39 minutes
60  39 = ?