If $$a:3=b:7=c:9$$​, then $$\frac{a+b+c}{a}$$​ = ?

The ratio of two numbers is 14:25. If the sum of the two numbers is 390, find the larger number.

If  $$\frac{x}{y} = \frac{4}{3}$$​ then $$\frac{x-y}{x+y} =$$​​

If x : 12 :: 4 : 6 then x value is

A vendor mixed 6.3 kg of peanuts, 2100 g of dates, 3.6 kg of cashews and packed the mixture equally into two and half dozen packets. The weight (in grams) of each packet is

The ratio of boys to girls in a school is 5:6. If there are 1100 students in total, find the number of boys.

The ratio of the number of students in Class A to Class B is 4:5. If 8 students are transferred from B to A, the ratio becomes 5:6. Find the original number of students in each class.

If (9x - 3y) = 96 and 4x : 3y = 20 : 21, then find the value of (2x² + 3y²).

Three numbers are in the ratio 2:3:5, and their sum is 100. Find the difference between the largest and smallest numbers.

Which ratio is the largest among 5 : 12, 14 : 31, 8 : 33 and 17 : 39?

A number when increased by 25% becomes equal to another number, which is 20% less than a third number. What is the ratio of the first number to the third number?