а) Приведите дроби $\frac{3}{2}, \frac{5}{4}, \frac{6}{5}, \frac{31}{25}$ к знаменателю 100.
б) Приведите дроби $\frac{2}{5}, \frac{5}{12}, \frac{7}{15}, \frac{13}{30}$ к знаменателю 60.
$\frac{3}{2} = \frac{3 * 50}{2 * 50} = \frac{150}{100}$
$\frac{5}{4} = \frac{5 * 25}{4 * 25} = \frac{125}{100}$
$\frac{6}{5} = \frac{6 * 20}{5 * 20} = \frac{120}{100}$
$\frac{31}{25} = \frac{31 * 4}{25 * 4} = \frac{124}{100}$
$\frac{2}{5} = \frac{2 * 12}{5 * 12} = \frac{24}{60}$
$\frac{5}{12} = \frac{5 * 5}{12 * 5} = \frac{25}{60}$
$\frac{7}{15} = \frac{7 * 4}{15 * 4} = \frac{28}{60}$
$\frac{13}{30} = \frac{13 * 2}{30 * 2} = \frac{26}{60}$