Sargent Park 8-17 Math

Monday, January 16, 2006

Mr. H's percent problem posting

A new week and a new chance to post.

The problem I found is this

Jon took a test with a total of 50 questions. His teacher told him that he must answer 90% of the questions correctly to earn an A. How many questions must he answer correctly to earn the A?

Please post an answer by placing it in my comments.

Did you get the right answer?

The solution can be found here


A great tutorial on how to solve percent problems.percent questions.

Good luck

Mr. H




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10 Comments:

  • This comment has been removed by a blog administrator.

    By Blogger Jem-Z 8-17, at 4:51 PM  

  • He must answer 45 of the questions corectly to get an A.

    Solution:
    To make it easier, change 50 into 100.
    Because we know that 1/2 of 100 is 50.
    So 90% of 100 = 90
    Then just divide 90 by 2.
    90/2. It should equal 45.

    Yes. I think i got the question right.......

    By Blogger Jem-Z 8-17, at 4:53 PM  

  • This comment has been removed by a blog administrator.

    By Blogger Ley-Ley8-17, at 6:28 PM  

  • 100% = 50
    10% = 5 10% x 9 = 90%
    90% = 45 (5x9)
    90% of 50 is 45.

    Jon must answer 45 questions correctly to receive an A.

    haha, i think i did that right.?

    By Blogger Ley-Ley8-17, at 6:29 PM  

  • He must answer______ questions.
    part correct answer
    whole = total questions
    ___= 90%
    50 100% 50x90
    100 = 45
    so He must answer 45 questions.

    By Blogger Rebecca G 8-17, at 6:47 PM  

  • Jon must answer 45 questions correctly...

    SoLuTiON;
    by using cross multiplication?..

    100%=50(total questions)
    90%(he must answer correctly to earn an A.)

    90% X 50 = 4500
    Then,
    4500 divide it by 100 = 45...
    :P

    By Blogger MyLa 8-17, at 9:52 PM  

  • This comment has been removed by a blog administrator.

    By Blogger MyLa 8-17, at 9:52 PM  

  • This comment has been removed by a blog administrator.

    By Blogger Becky, at 5:30 PM  

  • He has to complete 45 questions in order to get 90%

    PART = 90% WHOLE = 100%
    PART = ? WHOLE = 50

    90 X 50 / 100 = 45 !!!!!!!!!!!

    By Blogger Becky, at 5:33 PM  

  • 90%2=45
    100%2=50
    45/50is 90percent.

    By Blogger Squeaky_Cheeks74, at 5:31 PM  

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