Question

How do u decomposition 1 1/4

Answer 1

It is 5/4 if you want it in an improper fraction.
So the rule is multiply down low and add up high.
If you know what 1 (the whole number) times 4 (the denominator) will equal 4
Then add the 1 to the four that will equal 5 with the same denominator which is 4
The answer is 5/4
If that is what you asked

Answer 2

If you would like and improper fraction it would be 5/4