2. Сократите дробь: а) (7·4)/(7·5); б) 27/18; в) 1300/65000; г) (14·5+5·13)/25.

1. \(\frac{7\cdot4}{7\cdot5}=\frac{4}{5}\).
2. \(\frac{27}{18}=\frac{3}{2}\).
3. \(\frac{1300}{65000}=\frac{1}{50}\).
4. \(\frac{14\cdot5+5\cdot13}{25}=\frac{5(14+13)}{25}=\frac{135}{25}=\frac{27}{5}\).

Ответ: а) \(\frac45\); б) \(\frac32\); в) \(\frac1{50}\); г) \(\frac{27}{5}\).