Lesson 6-1
Pages 264-268
Ratios and
Rates
What you will learn!
1. How to write ratios as
fractions in simplest form.
2. How to determine unit
rates.
Ratio
Rate
Unit rate
What you really need to know!
A ratio is a comparison of
two numbers by division.
Ratios can be written in
three ways and should be
in simplest form.
Example 1:
Express the ratio 10 roses
out of 12 flowers as a
fraction in simplest form.
10 5

12 6
5 to 6
5:6
Example 2:
Express the ratio 21
inches to 2 yards as a
fraction in simplest form.
2 yards must be
converted into inches first!
2 yd x 36 inches = 72 inches
Example 2:
Express the ratio 21
inches to 72 inches as a
fraction in simplest form.
21 7

72 24
7 to 24
7 : 24
Example 3:
A 12-oz bottle of
cleaner cost $4.50. A
16-oz bottle of cleaner
cost $6.56. Which
costs less per ounce?
Example 3:
4.50 4.50  12 0.375


 0.38
12
12  12
1
6.56 6.56  16 0.41


 0.41
16
16  16
1
The 12-oz bottle is less per ounce!
Example 4:
A snail moved 30 feet in 2
hours. How many inches per
minute did the snail move?
30 feet must be changed to
inches.
2 hours must be changed to
minutes.
Example 4:
A snail moved 30 feet in 2
hours. How many inches per
minute did the snail move?
30 ft x 12 in = 360 inches
2 hrs x 60 min = 120 minutes
Example 4:
A snail moved 360 inches in
120 minutes. How many
inches per minute did the
snail move?
360 3
  3in/min
120 1
Page 266
Guided Practice
#’s 4-15
Read:
Pages 264-266
with someone at
home and study
examples!
Homework: Pages 266-268
#’s 16-46 even
51, 52, 54-70
Lesson Check 6-1
Page
736
Lesson 6-1
Lesson Check 6-1