Ответ:
- \(\frac{42}{63}=\frac{42:21}{63:21}=\frac{2}{3}\).
- \(\frac{56}{84}=\frac{56:28}{84:28}=\frac{2}{3}\).
- \(\frac{75}{105}=\frac{75:15}{105:15}=\frac{5}{7}\).
- \(\frac{96}{144}=\frac{96:48}{144:48}=\frac{2}{3}\).
Ответ: а) 2/3; б) 2/3; в) 5/7; г) 2/3.
