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Example: ^{2}⁄_{3} or 2:3

Proportion:It is used to compare two ratios (equivalent fractions).

a: b :: c: d

Cross product is a x d = b x c

Here a & d are extremes and b &c are means.

Cross product is a x d = b x c

Here a & d are extremes and b &c are means.

NOTE:

- A ratio is just a number with no units. For instance, the ratio of $6 to $2 is just 3, not $3.
- Ratios like 6 to 1 can be considered as 6.
- Ratios can be determined between the quantities of same units. For example, the ratio of $6 to 2 miles can’t be determined

Continued proportion is defined as the equality of three or more proportions.

1) Suppose p is the number of women and a is the number of men in a class.

(a) Find the women to men ratio?

**Answer:** p : a (or) p/a (or) p to a

(b) Find men to women ratio?

**Answer:** a : p (or) a/p (or) a to p

(a) Find the women to men ratio?

(b) Find men to women ratio?

2) A and P together have $ 120. If 6 of A's amount is equal to 3 of P's amount, how much amount does P have?

(a) $ 40 (b) $ 120 (c) $ 80 (d) $ 60

**Answer:** c

Explanation: 6A = 3P

A:P = 1:2

(a) $ 40 (b) $ 120 (c) $ 80 (d) $ 60

Explanation: 6A = 3P

A:P = 1:2