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This is the fifth lesson in my Math 7 - Unit 5 on Ratios and Proportions. This lesson contains a classwork activity where students practice calculating tax, tip and discounts, using proportions to solve percent word problems and use proportions to convert between measurements. Students then "Walk About" the class to look at posted cards on the walls that are hiding the solutions. The directions are in the preview. I have provided the student classwork sheet with answer key, the cards and "no peeking" covers to post on the walls of your class and a spiral review homework assignment with answer key. The homework assignment is a spiral review of my Unit 1 (rational numbers - powers, absolute value, perfect squares, and scientific notation) and Unit 2 (operations with rational numbers - evaluating algebraic expressions and word problems with rational numbers). The classwork activity supports VA SOL 7.3 and the homework assignment supports VA SOL 7.1, 7.2 and 7.11. If this lesson works well for you, check out all the other lessons from my Unit 5 on Ratios and Proportions in my TPT store. I plan to make a bundle once I upload all the lessons and activities. If you like this unit, you can also check out all the other Math 7 Units in my store.