Posted by **Deb** on Saturday, January 10, 2009 at 12:45pm.

Find the reciprocal of (-1/7) (21)

- Math 115 12 -
**drwls**, Saturday, January 10, 2009 at 12:55pm
The product of those numbers is -3, and the reciprocal of that is -1/3.

You could also compute it as the product of the reciprocals, (-7)x(1/21)

- Math 115 12 -
**Deb**, Saturday, January 10, 2009 at 1:01pm
sorry i don't understand

- Math 115 12 -
**drwls**, Saturday, January 10, 2009 at 1:10pm
The reciprocal of a whole number is "one over" the number, expressed as a fraction. For example, the reciprocal of 2 is 1/2.

The reciprocal of a fraction is the same fraction, upside down. For example, the reciprocal of 2/3 is 3/2. Now do you understand?

- Math 115 12 -
**Ms. Sue**, Saturday, January 10, 2009 at 1:10pm
This site may help you understand reciprocals.

(Broken Link Removed)

- Math 115 12 -
**Deb**, Saturday, January 10, 2009 at 1:42pm
so my answer is:

7/1 and 1/21 correct

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