7.RP.A.3: Ratio and percent problems

Also written as 7.RP.3

Use proportional relationships to solve multistep ratio and percent problems.

In plain words: Students use proportional relationships to solve multistep ratio and percent problems, like tax, tips, markups and markdowns, and percent increase and decrease.

Quick picks

GoblinsTeach it with
The shrink ray problem7th grade · Percent change · 2 min
Common mistake
Undoing a discount by raising the sale price by the same percent: $40 after 20% off was $40 ÷ 0.80 = $50, not $40 × 1.20 = $48.
Builds on
6.RP.A.3Ratio and rate problems7.RP.A.2Proportional relationships
Leads to
7.G.A.1Scale drawings8.EE.B.5Unit rate as slope
Example Problems
What is 400% of 7?
What is ?
What is ?
Khan Academy Resources
Multi-step ratio and percent problemsDiscount, markup, and commission word problemsPercent problemsProportion word problemsGrowing by a percentagePercent word problem: guavasPercent word problem: magic clubPercent word problems: tax and discount
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