Percent of a number
Question
A bicycle helmet has a regular price of $60. During a safety fair, the store takes 15% off the regular price. How many dollars does a shopper save on the helmet?
Answer
B. 9
Rationale
The amount saved is a percent of the regular price, so 15% is written as a decimal and multiplied by the 60-dollar price. The question asks for the savings, not the sale price; subtracting the savings from the regular price would answer a different question.
Worked solution: 15% of 60 = 15 ÷ 100 × 60 = 9.
Sources
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- Guide for the
- Lesson 3: Measures of Risk (Source: CDC)
- DOE-HDBK-1014/1-92
- Adapted from Open RN Nursing Skills, 2nd edition: Chapter 5 Math Calculations
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