3/2=(3×5)/(2×5)=15/10
8/5=(8×2)/(5×2)=16/10
4/3=(4×5)/(3×5)=20/15
12/5=(12×3)/(5×3)=36/15
9/7=(9×2)/(7×2)=18/14
7/2=(7×7)/(2×7)=49/14