How much does he save each month?

Dear Student,

Please find the below required solution.

$$\begin{gathered} Mr. Chowdhury earns per month = Rs. 10000 \\ Saving of Mr. Chowdhury per month = Rs. 3000 \\ saving income ratio of Mr Chowdhury = \frac{3000}{10000}=\frac{3}{10} \\ Now Mr. Ashraf earns per month = Rs. 9000 \\ Let Saving of Mr. Ashra per month = x \\ saving income ratio of Mr. Ashraf = \frac{x}{9000} \\ saving income ratio of Mr Chowdhury = saving income ratio of Mr. Ashraf [ Given ] \\ \frac{ 3 }{10}= \frac{x}{9000} \\ x = \frac{9000 \times 3}{10}=2700 Rs \\ So saving of Mr. Ashraf per month = Rs 2700 \end{gathered}$$

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