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Use what you learned about percents and estimation to complete Exercises 7–12 on page 178. Work with a partner. Use mental math to estimate each percent of a number. Use a calculator to check your estimate. a. 20% tip for a $29.45 meal b. 18% tip for a $29.45 meal c. 6% sales tax on a $21.89 shirt d. 9% sales tax on a $21.89 shirt e.
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