Holaaa!
To compare 3/4 and 9/11 we must first make the denominators the same number. To do this, we can multiply the numerators and denominators of the numbers by eachother. See below.
Denominators - 4 and 11 - we are going to multiply these to find out what the denominator of both our fractions will be.
4 * 11 = 44 - the denominator is therefore, 44.
Now we need to multiply the numerators by the opposite denominators. Numerators - 3 and 9 - (multiply by the opposite denominators) - 3 * 11 = 33 (33/44) - 9 * 4 = 36 (36/44)
Now that we've done that, we can compare our fractions.
9/11 = 36/44 ? 3/4 = 33/44
Which is greater? The answer is 9/11 (36/44)
9/11 > 3/4
I truly hope this helps you!