Write and Identify Ratios A ratio is: The ratio of circles to stars is 3 to 2. A ratio can be written in three ways: Write ratios (in two other forms)

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Presentation transcript:

Write and Identify Ratios A ratio is: The ratio of circles to stars is 3 to 2. A ratio can be written in three ways: Write ratios (in two other forms) for the following comparisons from the picture above. 1.stars to circles 2.circles to all items 3.stars to all items 4.all items to circles 5.all items to stars A comparison of one quantity to another quantity

Write ratios (in two other forms) for the following comparisons from the picture. 6.suns to stars 7.moons to stars 8.all items to moons 9.stars to all items Use the following to answer the questions below: An 80-piece orchestra has 12 violins, 8 violas and 6 cellos. 10.What is the ratio of violins to the total number of instruments in the orchestra? 11.What is the ratio of cellos to violas? 12.What is the ratio of violins, violas and cellos combined to the total number of instruments in the orchestra?

To simplify ratios: Write each ratio as a fraction. Simplify each ratio, if possible Are the ratios equivalent? Yes or No Write ratios using the picture at the right. Simplify the ratios Write the ratio as a fraction and reduce You can write the simplified ratio in any of the three ways Write as fractions – see if they are equal

Sometimes you are not given all the information you want to use in your ratio. Step 1) Step 2) 10.A hockey team won 10 games and lost 5. What is the ratio of the wins to the games played? 11.There are 3 girls and 26 boys in a math class. What is the ratio of girls to the total number of students? 12.Of the 30 employees at a restaurant, 12 employees work the night shift. What is the ratio of those who work the night shift to those who work the day shift? 13.Steve has 4 pair of Levis and 3 pair of khaki pants. What is the ratio of Levis to the total number of pants? Find the information you need first Simplify the ratio if possible