a)
[tex]5 \frac{2}{3} \times 2 \frac{7}{10} = \frac{17}{3} \times \frac{27}{10} = \frac{17}{1} \times \frac{9}{10} = \frac{153}{10} = 15.3[/tex]
b)
[tex]1 \frac{5}{100} \div 2 \frac{1}{3} = \frac{105}{100} \div \frac{7}{3} = \frac{105}{100} \times \frac{3}{7} = \frac{315}{700} = \frac{45}{100} = \frac{9}{20} [/tex]
