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Take 20% of the original amount and subtract it from the original amount. For example:

100 - 20%

100 - (0.20*100) = 100 - 20 = 80

An easier way to do the same problem is to know that if you subtract 20% from something then there will only be 80% of the original amount left (100% - 20%). So in the previous example take 80% of the original amount to get the same answer.

80% of 100 = 0.80 * 100 = 80

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โˆ™ 2011-06-08 16:15:41
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Q: How do you minus 20 percent?
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