Question

Выполните действие с дробями:
а) 2/7:5/9
б) 5 5/12:7 1/2

Answer 1

$a) frac{2}{7} : frac{5}{9} = frac{2}{7} cdot frac{9}{5} = frac{2cdot9}{7cdot5} = frac{18}{35}; \ \ b) 5 frac{5}{12} : 7 frac{1}{2} = frac{65}{12} : frac{15}{2} = frac{65}{12} cdot frac{2}{15} = frac{130}{180} = frac{13}{18}; \ \ \ \ boxed{boldsymbol{OTBET: frac{18}{35}; frac{13}{18};}}$

Answer 2

а) 2/7:5/9=2/7*9/5=18/35
б) 5 5/12:7 1/2=65/12*2/15=13/18