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Math Help - Basic question about percentage

  1. #1
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    Basic question about percentage

    Old brain can't get around this one today....its really basic, I'm pretty embarrassed.

    Insurance was:
    EUR2,681 for 2008
    It has increased to:
    EUR4,835 for 2010

    Whats the percentage increase from 2008 to 2010?

    Hoping for a swift reply, without too much laughter!

    Gerts.
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  2. #2
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    Quote Originally Posted by Gerts View Post
    Old brain can't get around this one today....its really basic, I'm pretty embarrassed.

    Insurance was:
    EUR2,681 for 2008
    It has increased to:
    EUR4,835 for 2010

    Whats the percentage increase from 2008 to 2010?

    Hoping for a swift reply, without too much laughter!

    Gerts.
    Hi Gerts,

    the premium has increased by 4,835-2,681=2,154\ euro

    It has increased from EUR2,681

    Hence, express the increase as a fraction of the initial amount.
    To convert a fraction to a percentage, multiply the fraction by 100.

    \frac{2,154}{2,681}(100)\ =\ percentage\ increase
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  3. #3
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    Thank you Archie,

    I'm on really old methods:

    "Cross multiply and divide by the one opposite the question mark"

    But, my problem was which figure to take as the 100% starting point, which you have so clearly explained is the initial amount.

    This, compounded with the fact that (if I've done it right) the answer is just over an 80% increase on the insurance in 2 years, unsurprisingly made me doubt my answer.
    And now, I have the difficult task of debating this with the insurance company.

    Best regards,
    Gerts.
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  4. #4
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    Quote Originally Posted by Gerts View Post
    Thank you Archie,

    I'm on really old methods:

    "Cross multiply and divide by the one opposite the question mark"

    But, my problem was which figure to take as the 100% starting point, which you have so clearly explained is the initial amount.

    This, compounded with the fact that (if I've done it right) the answer is just over an 80% increase on the insurance in 2 years, unsurprisingly made me doubt my answer.
    And now, I have the difficult task of debating this with the insurance company.

    Best regards,
    Gerts.
    Yes, that's a big hike in the premium.
    Almost double the original amount.
    Double would be an increase of 100 percent.
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