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Math Help - Percentages

  1. #1
    Member
    Joined
    Sep 2009
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    145

    Percentages

    Hi,

    May I be assisted with the following please?

    1.) A book was sold for $45 at a loss of 10%. What was the original price?

    10 \% \times 45 = 4.5

    \$45 + 4.5 = \$49.5

    \rm{Original \ Price} = \$49.5

    2.) A man bought a chair for $350. He sold it at a profit of 25%. How much was the selling price?

    350 \times 0.25

    = 87.5

    \rm{Selling \ Price} = 87.5 + \$350 = \$437.50
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  2. #2
    Super Member Quacky's Avatar
    Joined
    Nov 2009
    From
    Windsor, South-East England
    Posts
    901

    Re: Percentages

    Edit2: This post was editted after I made a mistake.

    1) I think 1 is incorrect.

    The man sold the book for $45 which was a 10% loss.

    This means that he only sold the book at 90% of the original price.
    Which means that 0.9x=45 where x is the original price in dollars.

    2) Is fine.
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