Can anyone explain the following:
A)
and the ratio/proportion:
B)
: = :
thanks in advance
How on earth is A) true?
Hello portiaThe only things you really need to understand here are:
- (because that's what a square root is)
- how to 'cancel' a fraction
Then it works like this:
... and 'cancel' in the usual way:
For B, you also need to understand that ratios work exactly like fractions: you can 'cancel' (i.e. divide each number in the ratio by the same thing) or you can 'un-cancel' (if there is such a word) by multiplying each number in the ratio by the same thing.
So starting with , multiply each number by :
Grandad