Question

выполните действия 9/20×2/3+5/14×7/25

Answer 1

$\frac{9}{20} * \frac{2}{3} + \frac{5}{14} * \frac{7}{25} = \frac{3}{10} + \frac{1}{10} = \frac{4}{10} = \frac{2}{5}$