Question: increase of what percent of original number

increase of what percent of original number

This is intro. algebra, still can't figure out these two problems. One is increased and the is decreased. 1. If 5 is increased to 9, the increase is what percent of the original number? 2. If 8 is decreased to 6, the decrease is what percent of the original number? Step-by-step would be appreciated.

Date Posted: September 07, 2007 Tagged Under: Percents (increase/decrease)
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Another way to think about this is that you are trying to calculate the difference between an original number and a new number and compare that difference to the original amount.

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The way you solve these problems is the following:

In an increase situation you take the larger number subtracted from the smaller number to find the difference between the two numbers. Then you need to divide the difference by the original number.

For a decrease you do the same thing except note that it is a decrease so the percentage needs to be labeled as a negative or stated that it is a decrease of that percentage. Let me know if this helps and if you need more info.

Ie. (9-5)/5= .8 multiply this by 100 to get an increase of 80%
(8-6)/8=.25 multiply by 100 to get a decrease of 25%