Ann makes 4 signs in 1 and 1/4 hours and if he worked 6 2/8 hours how many signs can he make?

1 1 / 4 = 1.25

6 2 / 8 = 6 1 / 4 = 6.25

1 * 6.25 / 1.25 = 1 * 5 = 5 signs