This Problem Set is a part of the Lesson 7, Unit 4, Grade 7. Understand that since a percent increase or decrease is a percent of an original amount, it makes sense to associate the original amount with 100% when solving problems. Reason about percentages as rates per 100 to solve percent increase and decrease problems. Encounter some situations where it is sensible to express the change in a quantity as a percentage of the starting amount.
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