Posted by Caleb on Friday, October 5, 2007 at 1:28am.
128 is what percent of 640?
3.4 is what percent of 5?
15 is what percent of 120?

Math  Ms. Sue, Friday, October 5, 2007 at 9:58am
Divide 128 by 640 and you get 0.2. More the decimal point two places to the right to get the percent.
120 is 20% of 640.
Now that you see how to figure this type of problem, you can do the other two. If you post your answers, we'll be glad to check them.
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