# 6-8 - \$3.9 is \$3.90 This is the tip \$26.00 \$3.90 = \$29.90...

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Estimating With Percents Lesson 6-8

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Sales Tax Round the cost of a given item to the  nearest dollar. Multiply that estimate by the decimal  version of the sales tax. Add the original price to the tax.
Example – A scarf costs \$14.99.  If the sales tax is  6%, how much does the scarf cost in all? \$14.99 \$15 6% 0.06 15 x 0.06 = 0.90 The tax is \$0.90. The scarf is about \$15.00, and the tax is about  \$0.90, so the total cost is about \$15.90.

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Estimating a Tip Estimate the cost of the meal to the  nearest dollar. Multiply that cost by the decimal version  of the tip (a tip is usually 15%). Add the tip to the bill for the total.
Example – A meal costs \$26.22.  What is the  total bill, including a 15% tip? \$26.22 \$26 15% 0.15 \$26 x 0.15 = \$3.9

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Unformatted text preview: \$3.9 is \$3.90. This is the tip. \$26.00 + \$3.90 = \$29.90 The total cost of the meal is close to \$30. Estimating a Sale Price Subtract the percent off from 100 to see what percent you are paying. Multiply the original price by the percent you are paying (in decimal form) For example, if an item was on sale for 25% off, then you are actually paying 75% of the original value. Example - A video game costs \$49.95. If it goes on sale for 30% off, then what is the sale price? The original price is about \$50. 100% - 30% means that we are paying 70% of the original cost. 70% is 0.7 in decimal form. \$50 x 0.7 = \$35. The sale price is about \$35. Homework Time...
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## This note was uploaded on 11/17/2011 for the course MATH 110 taught by Professor Staff during the Fall '08 term at BYU.

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6-8 - \$3.9 is \$3.90 This is the tip \$26.00 \$3.90 = \$29.90...

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