Q&A for How to Subtract Percentages in Math

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  • Question
    100 - 10% = 90, but 90 + 10% = 99. How is this possible?
    Community Answer
    Community Answer
    If you take 90 and divide by 10, you get 9. Therefore, ten percent of 90 plus 90 is equal to 90 + 9, which equals 99.
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  • Question
    A company manufactured 6,435 bars of soap. If it sold 20% of its bars of soap, how many bars of soap did it sell?
    Donagan
    Donagan
    Top Answerer
    Multiply the total number of bars by 0.2, or you could divide the total bars by 5.
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  • Question
    How do I calculate 20% of $79?
    Donagan
    Donagan
    Top Answerer
    Multiply $79 by 0.20.
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  • Question
    I bought a jacket. The price was originally $700. The discount was 30% off. What is the price of the jacket?
    Community Answer
    Community Answer
    $700(100% - 30%) = ($700)(70%) = $700(.7) = $490.
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