Return the percentage of minutes an hour

Write a function that takes a number of minutes, and returns its percentage of an hour.

return_percentage(60) == 100
return_percentage(30) == 50
import unittest


class TestMinutePercentage(unittest.TestCase):
    def test_return_minute_percentage(self):
        self.assertEqual(return_percentage(34), 56)
        self.assertEqual(return_percentage(12), 20)
        self.assertEqual(return_percentage(60), 100)