Percentages

Discussion in 'The Spam Zone' started by Amaury, Nov 17, 2016.

  1. Amaury Chaser

    Joined:
    Jan 15, 2007
    Gender:
    Male
    Location:
    Ellensburg, WA
    1,694
    There are cases where an assignment may have 10 questions, and you get a 9, giving you 90%. However, the instructor makes it out 5 instead, and 90% when it's out of 5 is 4.5. My question is this: is there a formula for finding the same percentage using a reduced score?

    There are sometimes cases where the percentage won't be exactly the same, but it will be pretty close, so another example is my recent energy quiz. I got a score of 30 out of 44 with a percentage of 68.2%, but since all previous quizzes were out of 20, he made it out of 20, giving me 13.7 out of 20 for 68.5%. Although it should actually be 13.6 for 68%, but he ignored the rules and just rounded up. (As you can see the percentage is not exactly the same in this case.) He mentioned something about multiplying the original value by 20, but I'm not quite sure what that means.
     
  2. Midnight Star Master of Physics

    Joined:
    Jun 7, 2009
    Gender:
    Female
    Location:
    England
    983
    753
    I'm tired and there's probably a much better simplified version of this but:

    [your score] / ([total test is out of] / 100) = [percentage score]

    sooo

    [score] = [percentage] * ([total test is out of] / 100)

    or something, this is simple maths but I'm tired and my brain isn't working
     
  3. Arch Mana Knight

    Joined:
    Oct 5, 2007
    Gender:
    Male
    Location:
    Anywhere
    2,430
    You really were tired. Fixed that little mistake for you.

    Edit: Never mind. Didn't see the outer parenthesis. I'm tired.
     
  4. ♥♦♣♠Luxord♥♦♣♠ Chaser

    Joined:
    Jan 13, 2009
    1,773
    Goh hme ark ur drenk
     
  5. Amaury Chaser

    Joined:
    Jan 15, 2007
    Gender:
    Male
    Location:
    Ellensburg, WA
    1,694
    I think I've figured it out.

    You get a score of 5 out of 10 on a quiz, which equals 50%. However, because you don't want the points to be so big, you want to make the total points possible 5 instead of 10 (despite there being 10 questions). It will still be 50%, just from 5 instead of 10.
    • Original Value: 5 / 10 = 0.5 * 100 = 50%
    • Conversion: 5 / 10 = 0.5 * 5 = 2.5
    • New Value: 2.5 / 5 = 0.5 * 100 = 50%
     
  6. Boy Wonder Dark Phoenix in Training

    Joined:
    Aug 31, 2008
    Gender:
    Male
    Location:
    Genosha
    2,239
    Yep. Divide your actual score by the possible score and multiply it by a hundred.