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Colouring by Percent Problems- Homer, Solo Math Mosaic

Grade Levels
7th - 12th
Formats Included
  • Zip
9 pages
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Students solve problems involving percent increase or decrease, such as after-tax costs, sales prices, discounts, depreciation of value, retail mark-up, population growth, inflation, etc.

They use their answers to decode the colour-key, allowing them to colour in the mystery mosaic of Homer Simpson. The colouring is a fun reward for all the hard work, and a motivating factor to get students to complete a page of problems!

INCLUDED (.pdf and .docx everything):
--> 3 different question sets with corresponding mosaics (finding both new or original amounts)
--> 3 different question sets with corresponding mosaics (finding only the new amounts)
--> Teaching Tips page with advice on teaching percentages
--> Answer keys for all versions (included in the Teaching Tips file) providing the numeric solutions for all problems

--> All versions have 12 problems. The first 6 involve percent increase, while the last 6 involve percent decrease
--> Each worksheet contains a randomized answer list at the bottom allowing students to check their answers before colouring. (self assessment)
--> Problems include (randomly) both cases where the students are asked to find the new amount after applying a percent increase or decrease, and in the "new or original" version, problems where students are given the increased or decreased amount and asked for the original amount.

If you'd like to try a COLLABORATIVE whole-class math mosaic, be sure the check out the whole Collaborative Math Mosaic directory, sorted by topic!

The student buy-in factor is HUGE with these worksheets; they all want to see the finished picture come together!

Leave the picture a secret or show it for motivation… it’s your call.

All my colouring worksheets use standard pencil-crayon colours found in the Crayola 24 pack. Perhaps a class set of pencil crayons would be a fun math department investment!

Feedback, suggestions, and frontline stories are always welcomed!

Thanks for checking this out!
~CalfordMath (CalfordMath@live.ca)
Total Pages
9 pages
Answer Key
Teaching Duration
2 days
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to see state-specific standards (only available in the US).
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.
Solve multi-step real-life and mathematical problems posed with positive and negative rational numbers in any form (whole numbers, fractions, and decimals), using tools strategically. Apply properties of operations to calculate with numbers in any form; convert between forms as appropriate; and assess the reasonableness of answers using mental computation and estimation strategies. For example: If a woman making $25 an hour gets a 10% raise, she will make an additional 1/10 of her salary an hour, or $2.50, for a new salary of $27.50. If you want to place a towel bar 9 3/4 inches long in the center of a door that is 27 1/2 inches wide, you will need to place the bar about 9 inches from each edge; this estimate can be used as a check on the exact computation.


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