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  1. #1
    Regular Coder Doctor_Varney's Avatar
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    Help for discalculus (number dyslexia)?

    Hello,

    This can sometimes be rather embarrassing, but I struggle to calculate simple numbers, unless they are in groups of exactly two, or ten and need to use an abacus to calculate anything which falls outside of this restriction.

    So what I'm interested to know is how I could go about finding the percentage of a number which is less or more than one hundred, using a basic electronic calculator?

    My aim is to build a three column liquid layout, where I need to work out the percentage of each column and it's gutter. I know it will sound stupid to some people, but to me, even the simplest of sums represent something of a headache.

    Many thanks,
    Last edited by Doctor_Varney; 06-21-2008 at 01:33 AM. Reason: Amendment to wording
    Definition: Computer rage is a heightened physiological response with associated feelings of anger and frustration[1] resulting from using a computer or other complex electronic device. It may result in the physical assault of the computer or similar item.[2] Computer use often leads to verbal abuse and occasionally physical violence towards the object.[3] Computer rage may be caused by distress due to a hardware or software problem which the enraged person is unable to correct.

  • #2
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    OK, I don't know how to apply this directly to your design but to work out a percentage of something, its like this

    say you want 15% (15 percent) of 200 you could get it like this

    200 * 15/100 or written that is 200 times 15 divided by 100.

    hth

    bazz

  • #3
    Regular Coder Doctor_Varney's Avatar
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    Thankyou, Baz. From that, I get that 15% of 200 is 30.

    But my maths problem is that I have widths that I want to convert to %.

    So I am trying, for instance, to discover what percentage 279 is of 800.

    I'm not looking to pick anyone's brains for specific answers, but instead find methods of helping myself overcome the discalculus, just as dyslexics find ways of understanding and writing words.

    Cheers,
    Last edited by Doctor_Varney; 06-21-2008 at 01:46 AM. Reason: Typo
    Definition: Computer rage is a heightened physiological response with associated feelings of anger and frustration[1] resulting from using a computer or other complex electronic device. It may result in the physical assault of the computer or similar item.[2] Computer use often leads to verbal abuse and occasionally physical violence towards the object.[3] Computer rage may be caused by distress due to a hardware or software problem which the enraged person is unable to correct.

  • #4
    The Apostate Apostropartheid's Avatar
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    The way I prefer is to use a decimal (it's simpler and requires one sum)
    15% of 200 = 200 × .15

    To solve your problem, you would find out what 1% of 800 is.
    You would then divide 279 by the 1% to get your answer.
    Like this: 1% of 800 = 8
    279 ÷ 8 = ~35
    279 is about 35% of 800.
    Last edited by Apostropartheid; 06-21-2008 at 01:46 AM.

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    Regular Coder Doctor_Varney's Avatar
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    From doing that, I reached 34.875 so I rounded up, as I suppose I should and got aprox. 35%.

    Thank you for your understanding, Cyan. I've written it down, for future reference.
    Definition: Computer rage is a heightened physiological response with associated feelings of anger and frustration[1] resulting from using a computer or other complex electronic device. It may result in the physical assault of the computer or similar item.[2] Computer use often leads to verbal abuse and occasionally physical violence towards the object.[3] Computer rage may be caused by distress due to a hardware or software problem which the enraged person is unable to correct.

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    Hey CyanLight,

    where'd you find the divide symbol? or did you use an ascii code?


    bazz

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    Regular Coder Doctor_Varney's Avatar
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    Hi Baz,

    I find this helpful for finding special characters: http://graveyard.maniacalrage.net/etc/special/

    The divide symbol's numerical code, in this case is: & # 2 4 7; (without the gaps, obviously). ÷
    Last edited by Doctor_Varney; 06-21-2008 at 02:06 AM. Reason: Typo
    Definition: Computer rage is a heightened physiological response with associated feelings of anger and frustration[1] resulting from using a computer or other complex electronic device. It may result in the physical assault of the computer or similar item.[2] Computer use often leads to verbal abuse and occasionally physical violence towards the object.[3] Computer rage may be caused by distress due to a hardware or software problem which the enraged person is unable to correct.

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    Quote Originally Posted by Doctor_Varney View Post
    Hello,

    This can sometimes be rather embarrassing, but I struggle to calculate simple numbers, unless they are in groups of exactly two, or ten and need to use an abacus to calculate anything which falls outside of this restriction.
    is nothing embarrasing, just a specific problem. I don't remember people names, I mean full names, instead I can memorise numbers like 3.1415926 , phone numbers, and so on,

    Quote Originally Posted by Doctor_Varney View Post
    So I am trying, for instance, to discover what percentage 279 is of 800.
    more directly what CyanLight said you can do this way:

    249 * 100 / 800

    and round low or up how you need.

    Edit: probably you need what bazz give as example to compute the space which remains after you positioning some elements, let's say 2 of 15% and 25%
    remain: 100 - 15 - 25 = 60
    and now apply bazz formula to compute if a picture fit inside the remaining space:
    800 * 60 /100 = 480

    regards
    Last edited by oesxyl; 06-21-2008 at 02:48 AM.

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    You should check out http://www.dyscalculiaforum.com too, lots of support

    (not selling anything, it's just a non-profit forum for dyscalculics)

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