Arrange these fractions from least to greatest 5-9 3-4 7-12?

To compare fractions, we need to have a common denominator. In this case, the common denominator for 9, 4, and 12 is 36.

Converting the fractions to have a denominator of 36, we get 20/36, 27/36, and 21/36.

Therefore, in order from least to greatest: 5/9, 7/12, 3/4.