Answer:

3.9/15 lowest term is 9

4.26/30 lowest term is 26

5.7/9 lowest term is 7

Step-by-step explanation:                                                          

                                                       To

3.   3+6=9/9+6=15          lowest 9----15 higher

4.   8+18=26/6+24=30   lowest 26----30 higher

5.    4+3=7/4+5=9           lowest   7----9 higher