(2)

See if the other denominators can be divided into 16 an even number

of times.

(4 and 8 can both be divided into 16 an even number of times.)

(3)

Change 1/4 to have a denominator of 16 without changing the value of

the fraction.

(a) Multiply the denominator by 4 to make it 16:

1

__

4 x 4 = 16

(b) To avoid changing the value, multiply the numerator by 4:

1 x 4 = _4

4 x 4 16

(4)

Change 3/8 to have the common denominator of 16.

(a) Multiply the denominator 8 by 2 to make it 16.

3

= __

8 x 2 16

(b) Because the value of the fraction is to remain the same, multiply

the numerator by 2.

3 x 2 = _6

8 x 2 16

(5)

Therefore, the fractions 1/4, 3/8, and 5/16, when changed to have a

common denominator, will be 4/16, 6/16, and 5/16, respectively.

e. When the denominators cannot be divided by the same number, find the

smallest denominator into which each of the original denominators will divide evenly. In

many cases, a common denominator can be found by multiplying one denominator by

the other.

For example: Find the common denominator for 3/4 and 2/3.

(1)

Multiply denominators to get a common denominator.

4 x 3 = 12 (Common denominator)

MD0802

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