Вычислите (5/6-3/10):(3/10+2/15)

1) [latex] frac{5}{6} - frac{3}{10}= frac{25-9}{30} = frac{16}{30} [/latex]2)[latex] frac{3}{10} + frac{2}{15} = frac{9+4}{30} = frac{13}{30} [/latex]3)[latex] frac{16}{30} / frac{13}{30}= frac{16}{30}* frac{30}{13} = frac{16}{13} [/latex]