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Thread: Mathematics wizard ?

  1. #1

    Mathematics wizard ?

    I can't figure this out. I'm selling some items for $120. Original cost was $1200, what is the percentage of saving and how did you figure it out.
    Wish I didn't know now what I didn't know then.
    Bob Seger

  2. #2
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    The saving is 90%
    There are two ways to calculate it:

    1. Selling price / original cost x 100 = Percentage of original price:
    (120 / 1200 x 100 = 10%), i.e. the selling price is 10% of the original cost, so 100% - 10% = 90% saving.

    2. (Original cost - selling price) / original price x 100 = %saving
    ((1200 - 120) = 1080.
    1080/1200 x 100 = 90%
    Last edited by TheVillageIdiot; 01-03-2020 at 08:07 AM. Reason: clarity
    T4 complete since 30 April 2012

  3. #3
    90% savings

    Original price $1200
    Subtract selling price $120 = $1080
    Divide the differnce between the two by the original price 1080/1200= .9
    Multiply .9 by 100 to convert to a percentage. .9 x 100 = 90%

    *sorry TheeVillageIdiot I didn't see your post until after I posted mine.

  4. #4
    Thank You for the answers. I knew it was 90% but was stumped on how to do the math. BTW Alexa is a dumb ass.
    Wish I didn't know now what I didn't know then.
    Bob Seger

  5. #5
    Senior Member pfcs49's Avatar
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    Quote Originally Posted by tvot View Post
    Thank You for the answers. I knew it was 90% but was stumped on how to do the math. BTW Alexa is a dumb ass.
    She can't be any dumber than my dear Siri!
    69yo male T12 complete since 1995
    NW NJ

  6. #6
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    I just tested the insults on my dear Alexa and she very calmly referred me to the feedback section on the Alexa app, without even the tone she often gets when I asked her the same question several times.

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