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Q&A #310


Teaching percents

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From: Claudia (for Teacher2Teacher Service)
Date: Mar 19, 1998 at 20:58:14
Subject: Re: Teaching percents

Percents is a topic that seems to plague lots of folks. 

One method I have found that works is to use two number lines. One number
line is always marked from zero to 100. The other number line contains the 
"problem" information  like "What percent of 11 is 55? The 11 is positioned 
on number line 2, and 55 is set to correspond to the 100 on number line 1.

        0....................................100
        0.........11..........................55  

Put an x on the first number line across from the 11. Then set up a 
proportion: 

   11 is to x as 55 is to 100  or  

   11/x = 55/100     x will be the percent. 

The positions can be changed based upon the information given.  

I hope this is something that you had in mind - maybe this is too
simplistic?

Good luck!

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