# 11. Use double number lines to determine percent of a number (FP)

teaches Common Core State Standards CCSS.Math.Content.6.RP.A.3c http://corestandards.org/Math/Content/6/RP/A/3/c
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Lesson objective: Use a double number line to determine percent of a given number.

Students practice determining percent of a number. Double number lines are used here because this model supports using benchmark percents to determine another percent of a number. This work develops students' understanding that percent is a special ratio comparing one number to 100.

Students engage in Mathematical Practice 2: Students reason abstractly and quantitatively as they focus on the part, the whole, and the percent in a given situation.

Key vocabulary:

• benchmark percent

Special materials needed:

• graph paper
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