Percentages

i understand how to take 5% 10%, 20%,30% of a number but im really confused by percentages like 28% and 4.3 %

Answers
The percentages that most people can do easily are things like 100 % or 50% or 10%. People know that 50% is the same as 1/2 and 10% means the same as 1/10. If you really understand percentages though it is easy to convert any percentage into a fraction. Look at the percentage symbol: %. Hidden in the symbol you can find the digits of the number 100 and that is a big clue; a percentage is just another way of saying how many hundredths of something. To take one of your examples let's look at 28% and call it 28/100. I don't know if you are happy with decimal fractions but 28% can be written as 0.28 and that is the kind of fraction that is useful on a calculator. If you want to find 28% of something just multiply it by 0.28 so there you are. Hope that I have helped?
chris_davies
22 March 2013
thank you!
tutor4me
22 March 2013
Yes, some percentages are very simple and people tend to know that 50% is a half and 10 is a tenth. If you really understand percentages then it is easy to convert any percentage into a fraction. Have a look at the percentage symbol: %. You can see that hidden in the symbol there are the digits of the number 100. A percentage is just another way of saying how many hundredths of something. Let us look at one of the examples you gave. 28% is the same as 28/100. I don't know if you are happy with decimal fractions but they are the fractions that are easy to use on a calculator. 28% is the same as 0.28. If you wanted to work out 28% of a number, just multiply it by 0.28 and it is really as simple as that. Hope that I have helped?
chris_davies
22 March 2013
Now have a think about your other example of 4.3% and see if what I have given you helps with that.
chris_davies
22 March 2013
so it would be something divided by 100 x 4.3?
tutor4me
22 March 2013
Yes, you could divide by 100 and then multiply by 4.3 or you could say just multiply by 0.043.
chris_davies
22 March 2013
oh right i understand now thanks!
tutor4me
22 March 2013
Thank you.
chris_davies
23 March 2013
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