a)
[tex] \frac{21}{105} \: \: | \frac{10}{105} | \frac{3}{105} [/tex]
b)
[tex] \frac{20}{180} | \frac{72}{180} | \frac{135}{180} [/tex]
c)
[tex] \frac{63}{462} | \frac{12}{462} | \frac{56}{462} [/tex]
d)
[tex] \frac{1}{72} | \frac{10}{72} | \frac{42}{72} [/tex]