How to subtract fraction with a missing denominator

Let's say that this is a question:

6/4 - 1. Your fraction is 6 over 4.

1 is basically a fraction. Any fraction that looks like 3/3, 2/2, or 40/40 always equals 1. So in this case, 4/4 would equal one.

Since 4/4 equals 1, your new equation would look like this:

6/4 - 4/4

6/4 minus 4/4 would equal 2/4, or one half. That is how you would subtract a fraction with a missing denominator.