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Math Help - solving an application

  1. #1
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    solving an application

    A school had 900 students at the start of a school year. If there is an enrollment increase of 7% by the beginning of the next year, what is the
    new enrollment?


    Here is how I came up with the answer: (It just don't seem right)

    900/B = 7/100 = 7*b = 900*100

    7B = 90,000

    B = 90,000/7 = 12,857 therefore the new enrollment is 12,857
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  2. #2
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    Quote Originally Posted by Patience View Post
    A school had 900 students at the start of a school year. If there is an enrollment increase of 7% by the beginning of the next year, what is the
    new enrollment?

    Here is how I came up with the answer: (It just don't seem right)
    900/B = 7/100 = 7*b = 900*100
    7B = 90,000
    B = 90,000/7 = 12,857 therefore the new enrollment is 12,857
    Hello,

    an increase of 7% means that the 100% will be 107%. Now you can set up the proportion:

    \frac{900}{100}=\frac{N}{107} where N is the new number of students.
    Solve for N. I've got 963 students

    EB
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