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Math Help - Percentages

  1. #1
    Newbie
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    Percentages

    1) 92.5% of 550=?

    a)506.45 b)521.65 c)518.55 d)508.75

    2)464/(16*2.32)=?

    a)12.5 b)14.5 c)10.5 d)8.5

    3) the owner of an electronics shop charges his customer 22% more than the cost price. if a customer paid RUPEES 1098 for a dvd player then what was the cost price of the dvd player?

    a)8000 b)8800 c)9500 d)9200 e) none of these
    Last edited by mr fantastic; September 8th 2009 at 07:09 PM. Reason: Moved from another thread, post title changed
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  2. #2
    MHF Contributor Amer's Avatar
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    Jordan
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    Quote Originally Posted by guru View Post
    1) 92.5% of 550=?

    a)506.45 b)521.65 c)518.55 d)508.75

    2)464/(16*2.32)=?

    a)12.5 b)14.5 c)10.5 d)8.5

    3) the owner of an electronics shop charges his customer 22% more than the cost price. if a customer paid RUPEES 1098 for a dvd player then what was the cost price of the dvd player?

    a)8000 b)8800 c)9500 d)9200 e) none of these

    just multiply the percentage with the number you have

    1)\left(\frac{92.5}{100}\right)(550) you calculate it

    3)\left(\frac{22}{100}\right)(1098)+1098 you calculate it

    2)\frac{464}{16(2.32)} multiply the denominator and the numerator with 100

    \frac{464(100)}{16(100\times 2.32)}

    \frac{46400}{16(232)} take factor 2 from 464

    \frac{2(23200)}{16(232)}

    \frac{2(100)}{16} you can continue
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