Florida B.E.S.T. MA.912.FL.1.2
The Standard
Extend previous knowledge of ratios and proportional relationships to solve real-world problems involving money and business.
Florida B.E.S.T. Standards for Mathematics
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students use ratios, unit rates, proportions, and percent equations to solve money and business problems. They interpret results involving prices, discounts, markups, taxes, commissions, and other financial quantities.
What Mastery Looks Like
- Students identify the relevant quantities, write a correct ratio, proportion, or percent equation, and solve with units. They check whether the result makes sense in the financial context.
Common Misconceptions
- Students may add a percent instead of multiplying by a scale factor, or use the original price as the wrong base. They may reverse ratios, ignore units, or assume every relationship is proportional.
How to Assess It
- Use this exit ticket: “A store buys a backpack for $24 and marks it up 35%. Find the selling price and show the proportion or equation used.”
Lesson moves
Ways to Teach It
Give pairs price tags, discount cards, and tax rates, then have them calculate final prices and verify each result with a calculator.
Ask students to explain why a 20% discount followed by a 20% markup does not return an item to its original price.
Run a matching game where students pair business situations with ratios, equations, unit rates, and correct solutions.
Have students compare unit prices from two grocery ads and write a recommendation that accounts for package size and total cost.
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Printable MA.912.FL.1.2 Worksheet
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Related Standards
- MA.7.AR.3.2
Apply previous understanding of ratios to solve real-world problems involving proportions.
- MA.7.AR.3.1
Apply previous understanding of percentages and ratios to solve multi-step real-world percent problems.
- MA.912.FL.1.1
Extend previous knowledge of operations of fractions, percentages and decimals to solve real-world problems involving money and business.
- MA.6.AR.3.5
Solve mathematical and real-world problems involving ratios, rates and unit rates, including comparisons, mixtures, ratios of lengths and conversions within the...
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