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Ratio: It is a comparison between two different things.

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

Cross product is a x d = b x c

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

1)Are these statements true or false?

(a)^{3}⁄_{5} = ^{15}⁄_{25}

(b)^{7}⁄_{9}=^{ 14}⁄_{18} , so 7 x14 = 9 x 18.

Answer: (a) True (b) False

2) If ^{P}⁄_{35} = ^{19}⁄_{5} find P?

Answer: P x 5 = 19 x 35

P = 19 x 7

P = 133

3) 8 for $1.00 is better than 10 for $ 1.25

(a) True (b) False (c) Both have the same value (d) can’t be determined

Answer: c