List of top Quantitative Aptitude Questions on Ratio and Proportion asked in ATMA

If \( \frac{a}{b} = \frac{1}{3} \), \( \frac{b}{c} = \frac{2}{2} \), \( \frac{c}{d} = \frac{1}{2} \), \( \frac{d}{e} = \frac{3}{3} \) and \( \frac{e}{f} = \frac{1}{4} \), then what is the value of \( \frac{abc}{def} \)?
The ratio of two numbers is 3 : 5. If 39 is added to the first, and 14 is added to the second, then the ratio becomes 6 : 7. What will be the ratio if 11 is added to the first number and 6 is added to the second number?
The ratio of milk to water in a 60-litre mixture is 7 : 3. How much water must be added to make the ratio 7 : 4?
An amount of Rs. 7,800 is divided among A, B and C in the ratio 2 : 3 : 8. How much does C receive?
If \(A:B = 3:4\) and \(B:C = 6:5\), then \(A:B:C\) equals:
Two numbers are in the ratio 5 : 8. If 9 is added to each, the ratio becomes 8 : 11. Find the larger number.

Arun’s present age in years is 40% of Barun’s. In another few years, Arun’s age will be half of Barun’s. By what percentage will Barun’s age increase during this period?