Verified answer

Explicação passo-a-passo:

[tex] \frac{7}{8} \div \frac{21}{2} = \frac{7}{8} \times \frac{2}{21} = \frac{14}{88} = \frac{2}{24} [/tex]

[tex]\large\sf{} \dfrac{7}{8} \div \dfrac{21}{2} \\ \\\large\sf{} \dfrac{7}{8} \times \dfrac{2}{21} \\ \\ \large\sf{} \dfrac{\cancel{7}}{8} \times \dfrac{2}{\cancel{21}} \\ \\ \large\sf{} \frac{1}{8} \times \dfrac{2}{3} \\ \\ \large\sf{} \frac{1}{\cancel{8}} \times \dfrac{\cancel{2}}{21} \\ \\ \large\sf{} \dfrac{1}{4} \times \dfrac{1}{3} \\ \\{\large\boxed{\boxed{  { \large \sf \dfrac{1}{12} }}}} [/tex]

[tex]{\large\boxed{\boxed{  { \large \sf Bons~Estudos }}}}[/tex]