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Ratio- compares one number to another.

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Ratio- compares one number to another. - PowerPoint PPT Presentation


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2 .6 Equivalent Ratios. Ratio- compares one number to another. Lowest terms- ratios are reduced to the lowest common denominator. A ratio is the quotient (dividing) of two numbers and is used to compare one number to another. The order of the numbers in a ratio is important.

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Presentation Transcript
slide1
2.6

Equivalent Ratios

Ratio- compares one number to another.

Lowest terms- ratios are reduced to the lowest common denominator.

slide2
A ratio is the quotient (dividing) of two numbers and is used to compare one number to another. The order of the numbers in a ratio is important.

Ratios can be written in three different ways:

1 to 3 1 : 3 1/3

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Write the ratio in 2 other ways:

4 =

7

3 :16 =

5 to 8 =

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Ratios can be reduced to lowest terms:

the ratio 2 = 1

8 4

2 to 8 = 1 to 4, 2:8 = 1:4

8 ft to 5 ft

The ratio is 8 to 5, 8 , 8:5

5

slide5
Equivalent Ratios

To find a ratio equivalent to another ratio you must multiply by 1: 2/2, 3/3, 4/4, etc

4 × 2 = 8

9 2 18

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Another way to find a ratio equivalent to another ratio is to simplify on your calculator (division).

a b/c key and EXE.

20 = 2

30 3

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To find if 2 ratios are equivalent to each other, you calculate the cross product.

180 180

10 = 15

12 18

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Find equivalent ratios for each fraction.

4 8

5 11

18 20

36 30

15 13

27 15

Are the ratios equivalent?

2 = 6 8 = 3 7 = 6

9 23 9 4 9 7

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Do Now

2:8 14:12

3:45 12:4

100:300 23:25

10:8 17:12

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