|You typed in the fractions 5/7 and 7/9 The pictures of the pies below will show you what these fractions mean.|
5 pieces of 7 total are shaded.
7 pieces of 9 total are shaded.
Now then, to answer your question about which fraction is larger, you just need to look at both pies, and decide which one has more shading. The pie with the most shading represents the larger fraction, and, the pie with the lesser shading represents the smaller fraction.
In this case, in looks like pie showing 7/9 has more shading that the pie showing 5/7. This means that 7/9 is larger than 5/7