Question

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Answer 1

\[A: B = \frac{ A }{ B }\] r u talking about this ?

Answer 2

the above mention relationship applies for all ratios.. could u pls mention an example about what u r talking about.. i mean a instance where this relationship goes wrong ?

Answer 3

or could u tell what was the exact lesson u got it confused ?

Answer 4

haha... its something like this
lets say we r making a cake and we r mixing sugar(s) and flour( F) in a ratio of 2:3
so...
S : F = 2:3
now in a question if they say the total weight of the cake is X kg and hence find the amount of sugar in the cake..

the relationship u mention comes at this point

if the total is X kg it means S + F = X which means
the amount of sugar in the cake as a fraction of whole is S/X

we can do the same for the ratio..
2 : 3
the whole amount will be ( 2+ 3) = 5
since the amount of sugar represent 2
the amount of sugar as a fraction of whole can be written as
2/5

now if know the value of X

we can say
S/x = 2/5
and use it to find S...

got it :) ?

Answer 5

kk.. basically
if
\[A: B = 2:3\]
then
\[\frac{ A }{ B } = \frac{ 2 }{ 3 }\]
and
\[\frac{ A }{ A + B}=\frac{ 2 }{ 5 }\]

it's the simplest explanation available; XD

Answer 6

o-o