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20 March, 05:29

What's the percent of change for 30 to 90

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  1. 20 March, 07:31
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    First of all, remember that 100% is one whole thing.

    Then. look at the problem, and see that 90 is three times 30.

    - - 90 is 300% of an entire 30.

    - - To go from 30 to 90, you have to increase the 30 by 200% of itself.
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