Question

By what number should 7 by 15 be divided to obtain 2 by 9.

Answer 1

Dear Student,

$$\begin{gathered} Letthenumberbex. \\ Then,\frac{7}{15}÷x=\frac{2}{9} \\ \Rightarrow \frac{7}{15}\times \frac{1}{x}=\frac{2}{9} \\ \Rightarrow x=\frac{7}{15}\times \frac{9}{2}=\frac{63}{30}=\frac{21}{10} \end{gathered}$$