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Math Help - Percentage problem

  1. #1
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    Unhappy Percentage problem

    This year, 75% of the graduating class of Harriet Tubman High School had taken at least 8 math courses. Of the remaining class members, 60% had taken 6 or 7 math courses. What percent of the graduating class had taken fewer than 6 math courses?

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  2. #2
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    Hello jesselovesmath
    Quote Originally Posted by jesselovesmath View Post
    This year, 75% of the graduating class of Harriet Tubman High School had taken at least 8 math courses. Of the remaining class members, 60% had taken 6 or 7 math courses. What percent of the graduating class had taken fewer than 6 math courses?

    75% away from 100% leaves 25% who had taken less than 8 math courses. And 60% of these had taken 6 or 7 courses. So 40% of them had taken fewer than 6.

    That's 40% of 25% = 10% of the whole class.

    (If you're not sure why, work out \frac{40}{100}\times\frac{25}{100}.)

    Grandad
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  3. #3
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    Thanks!

    Thanks for answering the question, Grandad.
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