me again with my maths night class, please help me to..

[dissle]

change a fraction into a percentage?

ie 2/5 is the same as %?

is there an easy way?

Get it over one hundred

So 2/5 -
you would need to find out how many 5's in 100
= 20
therefore you multiply by 20 on top and bottom
= 40/100
and what you have on top is your percent - 40%

HTH

work out what number you need to multiply the denoominator by to make 100 (in this case 20, as in 5x20=100) then multiply the top one by same (ie 2x20=40) to make a % (in this case 40%)

i think it's 5*100/2

sorry, i think it's actually 2*100/5

An alternative would be

2 divided by 5 = 0.4
0.4 x 100 = 40%
(Always multiply by 100 to create a percentage)

I think we used to write it at school as

2/5 x 100/1

neicie, how did you get the 0.4..dont get it?

Can't follow niecie either tbh !

My logic is that a percentage is x/100 so you need to make whatever fraction you have have a denominator of 100, multiplying top and bottom by same, so for 2/5

2x20 / 5x20 = 40/100 or 40%

If 2 is divided by 5 is 0.4

Say for example your fraction was 2/4 then you get 0.5 X 100 = 50%

yes, i get that. im going to have a go at some, ta Lizs

Sorry, have you worked it out yet?

Do it on the calculator if you don't want to long division but it works. I just checked as I thought I had made an enormous error and was making myself look like a plank - again Thankfully not this time.

Try it another way

2 x 100 = 200
5 x 1 = 5

Percentage = 200 divided by 5
= 40%

Actually that is the same as Shannaratiger.

I don't get where you get the 20 from. It seems to add an extra step that you don't need.

I hope you have found a way you are happy with though, Dissle.

As a mathematician (well I studied it at uni but dont do much with it now!!) How to turn any fraction into a percentage. for example, the fraction is a/b. The percentage is a/b multiplied by 100. eg 2/5= 2 divided by 5 times 100.