(8/11+3/22):5/11 19/24:(3/16+5/24)

(8/11+3/22):5/11= $1 \frac{9}{10}$

1) $\frac{8}{11} + \frac{3}{22} = \frac{16}{22} + \frac{3}{22} = \frac{19}{22}$

2) $\frac{19}{22} / \frac{5}{11} = \frac{19*11}{22*5} = \frac{19*1}{2*5} = \frac{19}{10} =1 \frac{9}{10}$

19/24:(3/16+5/24)=2

1) $\frac{3}{16} + \frac{5}{24} = \frac{9}{48} + \frac{10}{48} = \frac{19}{48}$

2) $\frac{19}{24} / \frac{19}{48} = \frac{19*48}{24*19} = \frac{1*2}{1*1} =2$