(1/3+0,5+0,25):(2/3+5/12) подробное решение

Решите задачу:

$\frac{ \frac{1}{3} + \frac{1}{2} + \frac{25}{100} }{ \frac{2}{3}+ \frac{5}{12} } = \frac{ \frac{1}{3} + \frac{1}{2} + \frac{1}{4} }{ \frac{2}{3}+ \frac{5}{12} } = \frac{ \frac{4}{12} + \frac{6}{12} + \frac{3}{12} }{ \frac{8}{12}+ \frac{5}{12} } = \\ \frac{13}{12} : \frac{13}{12} = \frac{13}{12} * \frac{12}{13} = 1$