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ashleykm

  • 4 years ago

how can i find the number of a percent for example 20% of 45

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  1. kumar2006
    • 4 years ago
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    9

  2. ashleykm
    • 4 years ago
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    is 0.9 the same as 9

  3. gandalfwiz
    • 4 years ago
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    Yes

  4. gandalfwiz
    • 4 years ago
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    No, wait, 0.09 is the same

  5. ashleykm
    • 4 years ago
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    i wanna know how you can find it

  6. gandalfwiz
    • 4 years ago
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    "percent" pretty much means "over 100," and 9/100=.09

  7. gandalfwiz
    • 4 years ago
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    You find it wit hproportions

  8. gandalfwiz
    • 4 years ago
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    20/100=x/45

  9. gandalfwiz
    • 4 years ago
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    cross multiply 20*45=100x

  10. gandalfwiz
    • 4 years ago
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    then solve for x 900=100x 9=x

  11. gandalfwiz
    • 4 years ago
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    so 9 is 20% of 45

  12. ashleykm
    • 4 years ago
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    thanks

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