b: \(\dfrac{17}{12}=\dfrac{17\cdot15}{12\cdot15}=\dfrac{255}{180}\)
\(\dfrac{31}{18}=\dfrac{31\cdot10}{18\cdot10}=\dfrac{310}{180}\)
\(\dfrac{8}{15}=\dfrac{8\cdot12}{15\cdot12}=\dfrac{96}{180}\)
c: \(\dfrac{7}{15}=\dfrac{7\cdot5}{15\cdot5}=\dfrac{35}{75};\dfrac{8}{25}=\dfrac{8\cdot3}{25\cdot3}=\dfrac{24}{75};\dfrac{11}{75}=\dfrac{11}{75}\)
d: \(\dfrac{8}{45}=\dfrac{8\cdot4}{45\cdot4}=\dfrac{32}{180};\dfrac{13}{180}=\dfrac{13}{180};\dfrac{4}{30}=\dfrac{4\cdot6}{30\cdot6}=\dfrac{24}{180}\)
e: \(\dfrac{51}{136}=\dfrac{3}{8}\)=27/72
60/108=5/9=10/18=40/72
26/156=1/6=3/18=12/72
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