a)
[tex] \frac{2}{7} \approx0.3\\ \\ \frac{5}{9} \approx0.6 \\ \\ \frac{1}{14} \approx0.1 \\ \\ \frac{11}{18} \approx0.6[/tex]
b)
[tex] \frac{2}{7} \approx0.29 \\ \\ \frac{5}{9} \approx0.56 \\ \\ \frac{1}{14} \approx0.07 \\ \\ \frac{11}{18} \approx0.61[/tex]