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Math Help - Percents

  1. #1
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    Smile Percents

    Hi

    Can someone please help me with this homework problem, and can u tell me step by step on how to figure it out please.
    Here it is:
    Sandra earns a salary of $350 per week plus an additional 5% commission on her sales. If her total earnings last week were $500, how much were her sales?


    Thanks,
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  2. #2
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    Quote Originally Posted by mustangman View Post
    Hi

    Can someone please help me with this homework problem, and can u tell me step by step on how to figure it out please.
    Here it is:
    Sandra earns a salary of $350 per week plus an additional 5% commission on her sales. If her total earnings last week were $500, how much were her sales?


    Thanks,
    Sandra's total earnings were $500, of which $350 was salaried, so she earned $150 in commissions (500-350). Since she receives 5% commission, that means $150 is 5% of her sales. 100% of her sales would be 20 times that, which is $3000.
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  3. #3
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by mustangman View Post
    Hi

    Can someone please help me with this homework problem, and can u tell me step by step on how to figure it out please.
    Here it is:
    Sandra earns a salary of $350 per week plus an additional 5% commission on her sales. If her total earnings last week were $500, how much were her sales?


    Thanks,
    Say that she made sales with a value of n

    Then we can get an equation: total = base + commission

    total = 500, base = 350, so commission is 150

    From this we can say 150 = 0.05n

    and multiply by 20 to solve for n
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  4. #4
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    Thanks, but i don't understand how to solve ones that have a varable.
    If i did ur problem right I got the answer $150.

    Is there a way u can explain it better 4 me. Thanks
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  5. #5
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    Can u explain this better please.
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  6. #6
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    Smile

    Quote Originally Posted by mustangman View Post
    Thanks, but i don't understand how to solve ones that have a varable.
    If i did ur problem right I got the answer $150.
    How? The total sales is n, not 0.05n. You need to solve for n in the equation. Do you know how to solve simple algebraic equations?

    The equation 150=0.05n can be written as

    150=\frac{5n}{100}

    \Rightarrow150=\frac n{20}.

    Now, do as e^(i*pi) said and multiply both sides by 20.
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