How do you turn 3 and one fourth into a ratio?

Answer 1

Here's one way

31/4 = 3 + 1/4

= 3*4/4 + 1/4 since 4/4 is the same as 1

= 12/4 + 1/4 and now that the denominators are the same, the numerators can be added to give

= 13/4