1. How are fractions used and applied in
the larger world?

2. Learning Target:
Students will learn how to compare
and order fractions.

3. You can use models to compare
fractions but we are going to focus
today on finding a common
denominator as a way to compare and
order fractions.

4. To find a common denominator you
can multiply the two denominators
together.

5. EXAMPLE 1 Comparing Fractions Using the LCD
Compare
5
6
.7
9
and

6. You can also find the LCM of the two
denominators which is called the Least
Common Denominator (LCD).

7. EXAMPLE 1 Comparing Fractions Using the LCD
Compare
5
6
.7
9
and

8. EXAMPLE 1 Comparing Fractions Using the LCD
Compare
STEP 1
5
6
.7
9
and

9. EXAMPLE 1 Comparing Fractions Using the LCD
Compare
STEP 1 Find the LCD: Because the LCM of 6 and 9 is 18, the LCD is 18.
5
6
.7
9
and

10. EXAMPLE 1 Comparing Fractions Using the LCD
STEP 2
Compare
STEP 1 Find the LCD: Because the LCM of 6 and 9 is 18, the LCD is 18.
5
6
.7
9
and

11. EXAMPLE 1 Comparing Fractions Using the LCD
STEP 2 Use the LCD to write equivalent fractions.
Compare
STEP 1 Find the LCD: Because the LCM of 6 and 9 is 18, the LCD is 18.
5
6
.7
9
and

12. EXAMPLE 1 Comparing Fractions Using the LCD
STEP 2 Use the LCD to write equivalent fractions.
Compare
STEP 1 Find the LCD: Because the LCM of 6 and 9 is 18, the LCD is 18.
5
6
=
5
6
.7
9
and

13. Remember whatever you multiply the
numerator by you must do the same to
the denominator to keep the fraction
equivalent.

14. 1. Copy and complete the statement with <, > or = :
GUIDED PRACTICE for Example 1, 2 and 3

15. 3
7
?
2
5
1. Copy and complete the statement with <, > or = :
GUIDED PRACTICE for Example 1, 2 and 3

16. 3
7
?
2
5
STEP 1 :
1. Copy and complete the statement with <, > or = :
GUIDED PRACTICE for Example 1, 2 and 3

17. 3
7
?
2
5
STEP 1 : Find the LCD :
Because the LCM of 7 and 5 is 35, the LCD is 35.
1. Copy and complete the statement with <, > or = :
GUIDED PRACTICE for Example 1, 2 and 3

18. 3
7
?
2
5
STEP 1 : Find the LCD :
Because the LCM of 7 and 5 is 35, the LCD is 35.
STEP 2 :
1. Copy and complete the statement with <, > or = :
GUIDED PRACTICE for Example 1, 2 and 3

19. 3
7
?
2
5
STEP 1 : Find the LCD :
Because the LCM of 7 and 5 is 35, the LCD is 35.
STEP 2 :
Use the LCD to write equivalent fractions.
1. Copy and complete the statement with <, > or = :
GUIDED PRACTICE for Example 1, 2 and 3

20. 3
7
?
2
5
STEP 1 : Find the LCD :
Because the LCM of 7 and 5 is 35, the LCD is 35.
STEP 2 :
Use the LCD to write equivalent fractions.
1. Copy and complete the statement with <, > or = :
GUIDED PRACTICE for Example 1, 2 and 3
3
7
=

21. http://www.mathplayground.com/how
to_comparefractions.html
Video on comparing and ordering
fractions.

22. Can you compare and order fractions
using finding common denominators?