Solving Basic Proportions


Provides two examples of solving for one unknown in a proportion by cross multiplying.

Grade 7 Material from CK-12

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Standards

7.RP.A.2

Recognize and represent proportional relationships between quantities.

7.RP.A.2.A

Recognize and represent proportional relationships between quantities.

7.RP.A.3

Use proportional relationships to solve multistep ratio and percent problems. Examples: simple interest, tax, markups and markdowns, gratuities and commissions, fees, percent increase and decrease, percent error