math

how do u figure out what 18% of 34 is?

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  1. Change 18% to a decimal: 0.18

    Multiply:

    0.18 * 34 = ?

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    Ms. Sue
  2. thanks so u move the decimal two to the left on the first #

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  3. Right.

    18% means 18 parts of 100. Another way of writing that is 18 hundredths or 0.18.

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    Ms. Sue
  4. so if u had 4% of 56 it would be o.o4 *56=the answer

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  5. Right.

    0.04 * 56 = ?

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    Ms. Sue
  6. thanks k so what about this...
    thirty percent of what number is 120?

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  7. how do u figure that out

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  8. 30% = 0.3

    Multiply.

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    Ms. Sue
  9. You can set up an equation:

    30%= .3, so you'll have

    .3x= 120 (where x is the number whose 30% is 120)

    x= 120/.3
    x= 400

    You can check by multiply .3 x 400= 120

    So 30% of 400 is 120

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