Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Chapter 6 Ratio, Proportion, and Triangle Applications

Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 6.1 Ratio and Rates

Martin-Gay, Prealgebra, 6ed 33 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. A ratio is the quotient of two quantities. Writing Ratios as Fractions For example, a percent can be thought of as a ratio, since it is the quotient of a number and % = or the ratio of 53 to 100

Martin-Gay, Prealgebra, 6ed 44 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. The ratio of a number a to a number b is their quotient. Ways of writing ratios are and a b a to b,a : b, Ratio

Martin-Gay, Prealgebra, 6ed 55 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. A rate is a special kind of ratio. It is used to compare different kinds of quantities. Writing Rates as Fractions

Martin-Gay, Prealgebra, 6ed 66 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. To write a rate as a unit rate, divide the numerator of the rate by the denominator. Finding Unit Rates ÷ 17 = 18.5 The unit rate is

Martin-Gay, Prealgebra, 6ed 77 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. When a unit rate is “money per item,” it is also called a unit price. Finding Unit Prices A store charges $2.76 for a 12-ounce jar of pickles. What is the unit price? ($0.23 per ounce )