(2)

Change the fraction 3/4 to have a denominator of 12.

(a) Multiply the denominator by 3 to make it 12:

3

= __

4 x 3 12

(b) To avoid changing the value, multiply the numerator by 3:

3 x 3 = _9

4 x 3 12

(3)

Change the fraction 2/3 to have a denominator of 12:

(a) Multiply the denominator by 4 to make it 12:

2

= __

3 x 4 12

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

2 x 4 = _8

3 x 4

12

(4)

Therefore, the fractions 3/4 and 2/3, when changed to have the least

common denominator, will be 9/12 and 8/12 respectively.

f.

For practice, change the following to have common denominators:

(1)

2/3, 5/15, 2/5

_______, _______, ________

(2)

1/12, 5/6

_______, _______

(3)

7/8, 3/6

_______, _______

(4)

3/4, 7/8, 5/16

_______, _______, ________

Answers: (1) 10/15, 5/15, 6/15

(2) 1/12, 10/12

(3) 21/24, 12/24

(4) 12/16, 14/16, 5/16

MD0802

1-5

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