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  • Aug 10, 2010, 06:45 PM
    indyliman
    Calculate Commissions of net income after commissions
    Income 100
    Sales Commission = 10% of net income (Income less commissions)

    Income $100 - (100*.10) = $90

    $100 * .10 = $10 -----> $10 is not 10% of $90.

    What algebraic expression would I use to solve this?
  • Aug 10, 2010, 10:41 PM
    morgaine300

    No, $10 is 10% of $100, so it can't be 10% of $90 as well.

    I'm not sure I'm understanding the question. Are you saying that $100 is some unknown net income + 10% of that unknown?

    i.e. income + (10% of income) = $100?

    Then just replace the "income" with a variable:

    x + (.10x) = $100

    (In this case, the $100 is 110% of the original.)

    Or, are you saying the $100 is some unknown income less 10% of that unknown:

    income - (10% of income) = $100

    x - (.10x) = $100

    (In this case $100 is 90% of the original.)

    Think of it in words and write out what you'd be doing if you had the numbers. Then substitute a variable for the unknown words.

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