1) 11      2) 4    3) 5      4) 15 :  5     - :22     _ :2    _ :10            _   15          7        8                  7  

[latex] \frac{11}{15}: 22= \frac{11}{15} : \frac{22}{1}= \frac{11}{15}* \frac{1}{22}= \frac{1*1}{15*2} = \frac{1}{30} [/latex] [latex] \frac{4}{7}:2= \frac{4}{7}: \frac{2}{1}= \frac{4}{7}* \frac{1}{2}= \frac{2*1}{7*1}= \frac{2}{7} [/latex] [latex] \frac{5}{8} :10= \frac{5}{8}: \frac{10}{1}= \frac{5}{8}* \frac{1}{10}= \frac{1*1}{8*5} = \frac{1}{40} [/latex] [latex] \frac{15}{7}:5 = \frac{15}{7} : \frac{5}{1}= \frac{15}{7}* \frac{1}{5}= \frac{3*1}{7*1}= \frac{3}{7} [/latex]