Lesson plan

Solve a percent problem by exploring the additive property

teaches Common Core State Standards CCSS.Math.Content.7.EE.B.3 http://corestandards.org/Math/Content/7/EE/B/3
teaches Common Core State Standards CCSS.Math.Content.7.RP.A.3 http://corestandards.org/Math/Content/7/RP/A/3
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2

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Big Ideas: A percent is another way to write a decimal or fraction that compares part to a whole where the whole is 100. Percents do not have an additive property. In this task, students will explore the idea of percent mark-up, specifically in a scenario of making a profit. Individual ingredients for lemonade are marked up at varying percentages. Students are faced with the decision as to whether it is equivalent to calculate individual ingredient mark-ups and/or to add the costs of the ingredients together and mark up by the sum of the percentages. Vocabulary: mark up, percent, profit Special Materials: Calculators as needed