Standards Covered
M.EE.7.RP.13  Use a ratio to model or describe a relationship.
Learning Goal:
• Level 23 – I will model and write a ratio to describe a relationship.
• Level 1 – I will match objects that represent a relationship.
Essential Questions:
• What does this ratio tell me?
• How can I model this relationship?
• How do you write a ratio that describes parttopart or parttowhole.
Vocabulary:
• Ratio  a way to show a relationship or compare two numbers of the same kind.
• Parttopart  a ratio that compares a selected number of parts to a number of other parts in a whole.
• Parttowhole  a ratio that compares a selected number of parts to the total number of parts in a whole.
• To – what is said when we state 5:8 as 5 “to” 8.
• Out of – what is said when we state 5/8 as a fraction to mean that 5 “out of” 8.
• Comparison  relations among two numbers or quantities.
Learning Goal:
• Level 23 – I will model and write a ratio to describe a relationship.
• Level 1 – I will match objects that represent a relationship.
Essential Questions:
• What does this ratio tell me?
• How can I model this relationship?
• How do you write a ratio that describes parttopart or parttowhole.
Vocabulary:
• Ratio  a way to show a relationship or compare two numbers of the same kind.
• Parttopart  a ratio that compares a selected number of parts to a number of other parts in a whole.
• Parttowhole  a ratio that compares a selected number of parts to the total number of parts in a whole.
• To – what is said when we state 5:8 as 5 “to” 8.
• Out of – what is said when we state 5/8 as a fraction to mean that 5 “out of” 8.
• Comparison  relations among two numbers or quantities.
A ratio is a comparison of two numbers or quantities.
 Ratios that are written as parttowhole are comparing a specific part to the whole.
 Fractions and percents are examples of parttowhole ratios.
 Fractions are written as the part being identified compared to the whole amount.
 A percent is the part identified compared to the whole (100).
 Rates, a relationship between two units of measure, can be written as ratios, such as miles per hour, ounces per gallon and students per bus.
 Early learning of fractions is a part of understanding ratios.
 Fractions show a part of the whole.
 While we identify a ¼ measuring cup as a tool, this also represents that ¼ is 1 part of a whole that has 4 parts, or the 1cup measurement tool.
 This concept of fractions can be applied to learning about a ratio.
 Teaching ratio, percent and rates should be applied to realworld situations and scenarios.
 A percent is a ratio that compares a number to 100. 10 percent (10%) means that there are 10 parts out of the whole of 100.
 As this is calculated in a ratio, 10% may also be represented as 1 part of the whole of 10.
 These concepts of ratio and percent can be presented in realworld problemsolving scenarios.
Worksheets
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Ratio, an interactive worksheet by lbenitez
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Ratio proportion, an interactive worksheet by Tanveer_Fatima
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Mathematics 6  2nd Periodical Exam, an interactive worksheet by davidjohnjavier
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