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Very Quick Maths Question, would like to know the answer!

a/b = 2/5 find a:b
the / is just a representation of the fraction
Original post by Nathaniel911
a/b = 2/5 find a:b
the / is just a representation of the fraction

yes.
2/5 and 2:5 is the exact same thing.
Original post by qwert7890
yes.
2/5 and 2:5 is the exact same thing.

NO... you are joking-

In my exam today I wrote 2:5 and then i kept changing the answer and got something completely different. I dont know why i changed it...
Original post by qwert7890
yes.
2/5 and 2:5 is the exact same thing.

oh wait seriously?
The more I'm looking at it, the more that doesn't make sense... :frown:
i swear they can't be the same lol.
I'm doing further maths a level this is embarrassing...
(edited 2 years ago)
Original post by Nathaniel911
NO... you are joking-

In my exam today I wrote 2:5 and then i kept changing the answer and got something completely different. I dont know why i changed it...

which year are you in, if you don't mind me asking? :smile:

Well 2:5 can also be written as 4:10, 8:20, 1:2.5.... did you perhaps change it to this (you'll get lucky!)
Original post by Qxi.xli
oh wait seriously?
The more I'm looking at it, the more that doesn't make sense... :frown:
i swear they can't be the same lol.
I'm doing further maths a level this is embarrassing...

2/5 in decimal form is 0.4
2:5 in decimal form is 0.4

The : can easily be replaced by a / sign.
(edited 2 years ago)
Original post by qwert7890
2/5 in decimal form is 0.4
2:5 in decimal form is 0.4

The : can easily be replaced by a / sign.

but for 2:5, the probability of 2 is 2/7?
Original post by Qxi.xli
but for 2:5, the probability of 2 is 2/7?

That's because that's an entirely different meaning altogether.

2:5 means that in every 7 parts, there will be 2 of the former kind and 5 of the latter, hence 2/7
2/5 means that in every 5 parts, there will be 2 of the former kind.
Original post by qwert7890
That's because that's an entirely different meaning altogether.

2:5 means that in every 7 parts, there will be 2 of the former kind and 5 of the latter, hence 2/7
2/5 means that in every 5 parts, there will be 2 of the former kind.

oh thank youu
Original post by qwert7890
which year are you in, if you don't mind me asking? :smile:

Well 2:5 can also be written as 4:10, 8:20, 1:2.5.... did you perhaps change it to this (you'll get lucky!)

Well I'm in year 11, usually good at maths (I get around 70/80 in all my maths tests) however I completely blanked this question and I wrote weird things. I hope I get a mark for 2a:5b but I doubt it.
Original post by Nathaniel911
Well I'm in year 11, usually good at maths (I get around 70/80 in all my maths tests) however I completely blanked this question and I wrote weird things. I hope I get a mark for 2a:5b but I doubt it.

dw I'm sure you'll do fine :smile:

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