$$1 \frac{2}{5} = \frac{7}{5} = \frac{14}{10} = \frac{21}{15}$$
$$0,3 = \frac{3}{10} = \frac{6}{20} = \frac{9}{30}$$
$$-3 \frac{1}{4} = -\frac{13}{4} = -\frac{26}{8} = -\frac{39}{12}$$
$$-27 = -\frac{27}{1} = -\frac{54}{2} = -\frac{81}{3}$$
$$0 = \frac{0}{1} = \frac{0}{2} = \frac{0}{3}$$