1. Section 6.1
Ratios and
Rates

2. Ratio Ratio is the quotient of two quantities.
Ratio can be written in three notations
Fraction notation
To notation a to b
Colon notation a : b

3. Example Write the ratio 25:39 in to notation.
Write the ratio ¾ in colon notation
Write the ratio 2.5 to 1.6 in fraction notation

4. Example
Find the ratio of the width to the perimeter given the swimming pool below.

5. Rate
A special type of ratio is a rate. Rates are used to compare different kinds of quantities.

6. Example Given the statement 5 shrubs every 15 feet
Write the rate as a fraction then simplify.

7. Example Given the statement 8 phone lines for 36 employees
Write the rate as a fraction then simplify.

8. Unit Rate
A rate where the denominator reduces down to one, if needed divide with decimals.

9. Example Write each rate as a unit rate
The state of Delaware has 631,500 registered voters for two senators.

10. Example
Write each rate as a unit rate
275 miles in 4 hours

11. Example
Find the unit price for each and then decide which one is the better buy.
Crackers
$3.29 for 8 ounces
$4.79 for 12 ouncs

12. Example
Find the unit price for each and then decide which one is the better buy.
Shampoo
20 ounces for $1.89
32 ounces for $3.19