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Math Help - [SOLVED] use proportion to solve percents?..trying to help child with her homework!!!

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    [SOLVED] use proportion to solve percents?..trying to help child with her homework!!!

    1. a mat was reduced by 25% or 55 dollars from its origional price. what was the origional price?

    2. a man bought a jacket at a cost of 89 dollars a jacket. he sells them for 111.25 per jacket. what was his percent of mark-up?

    3. a pair of boots bought online. the cost was 141.60. this included a duty tax of 21.60. calculate the percent duty charged on the boots.

    4. mr. kim is a real estate broker. his salary is 2650 per month, plus 0.25% of sales. to earn 5000.00 in a month, how much does he need to sell.
    Last edited by anndodo; February 9th 2009 at 01:44 PM. Reason: need help asap
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  2. #2
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    Quote Originally Posted by anndodo View Post
    1. a mat was reduced by 25% or 55 dollars from its origional price. what was the origional price?

    2. a man bought a jacket at a cost of 89 dollars a jacket. he sells them for 111.25 per jacket. what was his percent of mark-up?

    3. a pair of boots bought online. the cost was 141.60. this included a duty tax of 21.60. calculate the percent duty charged on the boots.

    4. mr. kim is a real estate broker. his salary is 2650 per month, plus 0.25% of sales. to earn 5000.00 in a month, how much does he need to sell.
    Hello again ann,

    Problem 1:

    Let x = original price

    Let x - 55 = amount the mat was reduced to

    Let x - .25x = amount the mat was reduced to

    x - 55 = x - .25x

    Solve for x.

    Problem 2:

    Let 89 = cost of jacket

    Let 111.25 = selling price

    Let 111.25 - 89 = 22.25 = the amount of markup

    Let \frac{22.25}{89}=.25=25% = per cent of markup.

    Problem 3:

    Let 141.60 = cost of boots plus duty

    Let 21.60 = duty

    Let 141.60 - 21.60= 120 = cost of boots alone

    Let \frac{21.60}{120}=.18=18% = per cent duty charged on the boots.

    Problem 4:

    Let 2650 = Kim's salary

    Let x = amount of sales needed

    2650 + .25x = 5000

    Solve for x to get the amount he needs to sell to obtain a $5000 monthly salary.
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    thank you!!!!!!!!!!!!!!
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