Answer:
A.
[tex] \frac{15}{21} \div \frac{5}{7} = \frac{5.3}{7.3} \div \frac{5}{7} = \frac{5 \times 7}{7 \times 5} = \frac{35}{35} = 1[/tex]
B.
[tex] \frac{10}{12} \div \frac{3}{4} = \frac{5.6}{6.2} \div \frac{3}{4} = \frac{5 \times 4}{6 \times 3} = \frac{20}{18} = \\ \\ \frac{10.2}{9.2 } = 1 \frac{1}{9} [/tex]
C.
[tex]2 \frac{4}{5} \div \frac{3}{10} = \frac{14}{5} \div \frac{3}{10} = \frac{14 \times 10}{5 \times 3} = \\ \frac{140}{15} = \frac{28.5}{3.5} = 9 \frac{1}{3} [/tex]
Sana makatulong Salamat
#skeptron correct me if I'm wrong
