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Ratios and Proportions

Ratios and Proportions. By Ms. Edelstein. Ratio. A ratio is a comparison of 2 quantities. Though, they are said the same, there are 3 ways to write a ratio: All of these ratios are read “1 to 2”. ½ (looks like a fraction) 1:2 1 to 2. Ratios - Examples.

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Ratios and Proportions

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  1. Ratios and Proportions By Ms. Edelstein

  2. Ratio • A ratio is a comparison of 2 quantities. • Though, they are said the same, there are 3 ways to write a ratio: • All of these ratios are read “1 to 2”. • ½ (looks like a fraction) • 1:2 • 1 to 2

  3. Ratios - Examples There is a ratio of 3 smiley faces to 4 lightening bolts. • Written as ¾, 3:4 or 3 to 4. There is a ratio of 2 suns to 9 objects. • Written as 2/9, 2:9 or 2 to 9.

  4. Ratios - Practice What is the ratio of yellow rectangles to blue circles? 1:5

  5. Ratios - Practice What is the ratio of pink rectangles to yellow rectangles? 2:1

  6. Review • Remember a ratio compares of 2 amounts. • There are 3 ways to write a ratio: • All of these ratios are read “3 to 8”. • 3/8 (looks like a fraction) • 3:8 • 3 to 8 • Be careful to write ratios in the correct order so that they can be understood.

  7. The End

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