percentages
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percentages
What is the easiest way to work this one out:
Mrs Jones earns £21,000 and gets a 7.5% pay rise. What is her new salary?
(from Bond 10-11+)
Any help would be appreciated.
Mrs Jones earns £21,000 and gets a 7.5% pay rise. What is her new salary?
(from Bond 10-11+)
Any help would be appreciated.
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- Joined: Thu Jan 10, 2008 10:53 am
- Location: kent
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- Joined: Thu Jun 05, 2008 10:20 am
Thanks everyone.
I was trying to do it as a sum: times by 7.5, divide by 100 and add to salary but the figures get a bit messy for a ten year old.
She likes to do things in hear head using mental maths so I think she would prefer to do it this way. I guess this is really what they are looking for with this type of question anyway.
I was trying to do it as a sum: times by 7.5, divide by 100 and add to salary but the figures get a bit messy for a ten year old.
She likes to do things in hear head using mental maths so I think she would prefer to do it this way. I guess this is really what they are looking for with this type of question anyway.
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Re: percentages
I would urge Mrs Jones to show some wage constraints as this will only fuel inflation (and make me jealous)Here we go again wrote:What is the easiest way to work this one out:
Mrs Jones earns £21,000 and gets a 7.5% pay rise. What is her new salary?
(from Bond 10-11+)
Any help would be appreciated.
10% of 21k is 2100
7.5% is 3/4 of 10%
2100/2=1050 1050/2=525
525 * 2 = 1050 + 525 = 1575
add on the original
22575
Regards
SVE
Animis opibusque parati
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I agree. This method tends to be easier. I have added brief explanations.kentish maid wrote:i'd say
10% =2100
therefore 5 % = 1050 [ halve the 10% -i.e. divide by 2]
therefore 2.5 % =525 [ halve the 5% - divide by 2]
7.5% = 525 + 1050 =1575 [ 7.5% = 5% + 2.5%]
I guess which method you chose depend on what calculation your more comfortable with.
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Correct. However, most of the questions in 11+ and common entrance are phrased in such a way as to not require a calculator. So you are more likely to find whole percentages or half or 3/4 rather than xx.76. Remember also the kids have between 60 and 90 seconds to do the questions.T.i.p.s.y wrote:I agree that some of these methods may be easier than other methods, but what if the figure was 18.76% for example? You couldn't then use these methods as easily so is it not better to have one method for all percentages, and I don't necessarily mean my method?!