[tex] - \frac{20}{12} \div \frac{11}{10} = \\ \\ - \frac{20}{12} \times \frac{10}{11} = \\ \\ 20 \div 4 = 5 \\ 12 \div 4 = 3 \\ \\ - \frac{5}{3} \times \frac{10}{11} = \\ \\ \frac{5 \times 10}{3 \times 11} = \\ \\ - \frac{50}{33} [/tex]
