Ratio and Proportion Flashcards

1
Q

What is proportion?

A

A proportion is a name we give to a statement that two ratios are equal. It can be written in two ways:

two equal fractions, a/b = c/d

or

using a colon, a:b = c:d

Ratio compares part to part

Proportion compares part to whole

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2
Q

When are two ratios equal?

A

when the cross products of the ratios are equal.

That is, for the proportion, a:b = c:d , a x d = b x c

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3
Q

How to find an equivalent ratio?

A

To find an equivalent ratio we can divide both parts of a ratio by same number, or we can multiply both parts of same ratio by same number.

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4
Q

When is a ratio is in its simplest form?

A

When both numbers in the ratio have no common factors other than 1

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