The value of a ratio does not change if both the terms are multiplied by the same non-zero number.

If a : b = 9 : 7 and b : c = 7 : 61, then a, b and c are in continued ratio.

If increase in one quantity causes decrease in the other quantity, then the two quantities are in direct variation.

If a man takes 17 days to complete a work, then the fraction of work done by him in 1 day is $$\frac{1}{17}$$.

Simplest form of the ratio $$\frac{4}{5} : \frac{6}{7}$$ is 30 : 28.

If an increase in one quantity causes a corresponding increase in the other quantity, then the two quantities are in direct variation.

To find the ratio between the same kind of quantities, quantities should be expressed in the same unit.

The weight of 8 notebooks is 4.56 kg. What is the weight of 12 such notebooks?

If x, y and z are three numbers such that x : y = 7 : 8 and y : z = 16 : 35, then what is x : z?

What is the compound ratio of 7 : 3 and $$\frac{1}{5} : \frac{3}{10}$$?

A number is divided into two parts in the ratio 5 : 11. If the first part is 225, what is the number?

In what ratio should we decrease 1,500 to get 800?

In what ratio should we increase 900 to get 1,200?