Answer :
you would have to turn them into improper fractions, after that you would have to see which one has the bigger number on top. To find the improper fraction:
2 11/12 = 2x12+11 3 7/9 = 3x9+7
= 35/12 = 34/9
2 11/12 = 2x12+11 3 7/9 = 3x9+7
= 35/12 = 34/9