#
Rule 15: DIVISION

** To divide a fraction by a whole number, or a whole
number by a fraction, convert the division process to a multiplication
process, and complete the following steps.
**

**
**

**1.**
** Convert the whole number to a fraction
****2.**
** Change the sign to and invert the fraction to the right of the sign.
****3.**
** Multiply the numerators.
****4.**
** Multiply the denominators.
****5.**
** Reduce the results. (See Rule 10)
****a.**
- Factor the product of the numerators.
**b.**
- Factor the product of the denominators.
**c.**
** Look for the fractions that have a value of 1.**

**Example :** Multiply .

**Answer:** The answer is .

**Solution:** Convert the 7 to the fraction
. The problem can now be written as

Change the division sign to multiplication and invert the fraction to
the right of the sign.

Multiply the numerators and the denominators, but leave them in
factored
form.

The numerator and denominator do not share a common factor, therefore
the answer is

.

**Check:** You can check the answer with your calculator.
Calculate 3 divided by 4 and divide that result by 7. Now calculate 3 divided by 28. If the answers are the same, you have correctly worked this problem.

### If you are interested in reviewing another example, click on the word
Example.

### Work the following problems and click on Answer to check your
results.

**Problem 1:** Calculate and reduce your answer. Answer

**Problem 2:** Calculate and reduce your answer. Answer

**Problem 3:** Calculate
and reduce your answer.
Answer

**Problem 4:** Calculate and
reduce your answer.Answer

Menu Back To Dividing Simple
Fractions

S.O.S MATHematics home page
Do you need more help? Please post your question on our
S.O.S. Mathematics CyberBoard.

*Author:
Nancy Marcus** *

Copyright © 1999-2017 MathMedics, LLC. All rights reserved.

Contact us

Math Medics, LLC. - P.O. Box 12395 - El Paso TX 79913 - USA

users online during the last hour