Use proportional relationships to solve multistep ratio and percent problems

Start lessonBegins with Tax tips and interest · Slides

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Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework

Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
Guided Notes →One page your students fill in and keep.
Exit Ticket →Three items at the end of class. No student accounts.
Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
Homework →Assign practice; it grades itself.

7.RP.A.3

**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.

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.

What you'll learn

Identify the type of percent problem (percent of a quantity, percent increase/decrease, percent error) and select the appropriate proportional relationship to model it
Solve problems involving tax, tips, markups, markdowns, commissions, and fees by computing a percent of a base amount and combining with the original quantity
Calculate simple interest using the formula I = prt and interpret each variable in context
Compute percent increase and percent decrease using the relationship (change / original) x 100
Calculate percent error as |measured - actual| / actual x 100 and interpret it in context
Solve multistep problems by chaining proportional relationships, tracking intermediate quantities, and assessing the reasonableness of final answers

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