Quy đồng các mẫu số sau:
a)\(\frac{17}{20}\)' \(\frac{13}{15}\)và\(\frac{41}{60}\) b)\(\frac{25}{75}\),\(\frac{17}{34}\)và \(\frac{121}{132}\)
c) \(\frac{3}{8}\),\(\frac{19}{20}\)và\(\frac{8}{15}\) d) \(\frac{1}{2}\),\(\frac{2}{3}\),\(\frac{3}{4}\),\(\frac{4}{5}\),\(\frac{5}{6}\) ,\(\frac{6}{7}\),\(\frac{7}{8}\),\(\frac{8}{9}\),\(\frac{9}{10}\)