m:n = 213:1152\frac{1}{3} : 1\frac{1}{5}231:151 = m : n = 73:65\frac{7}{3} : \frac{6}{5}37:56
73:65\frac{7}{3} : \frac{6}{5}37:56 = 73÷65\frac{7}{3} \div \frac{6}{5}37÷56
mn\frac{m}{n}nm = 73×56\frac{7}{3} \times \frac{5}{6}37×65
mn\frac{m}{n}nm = 3518\frac{35}{18}1835 = m = 35n18\frac{35n}{18}1835n
n : q = 112:1131\frac{1}{2} : 1\frac{1}{3}121:131 = 32:43\frac{3}{2} : \frac{4}{3}23:34
nq\frac{n}{q}qn = 32×34\frac{3}{2} \times \frac{3}{4}23×43
nq\frac{n}{q}qn = 98\frac{9}{8}89 = q = 8n9\frac{8n}{9}98n
q : m = 8n9\frac{8n}{9}98n : 35n18\frac{35n}{18}1835n
qm\frac{q}{m}mq = 8n9÷35n18\frac{8n}{9} \div \frac{35n}{18}98n÷1835n
qm\frac{q}{m}mq = 8n9×1835n\frac{8n}{9} \times \frac{18}{35n}98n×35n18
=qm=1635\frac{q}{m} = \frac{16}{35}mq=3516 = q : m = 16 : 35