math
posted by milan .
if 12 counters are 3/4 of a set, what is the whole set of counters?

X = whole set.
3/4 X = 12
Multiply both sides by 4 and divide both sides by 3.
I hope this helps. Thanks for asking. 
If 3/4 of the set is 12
then 1/4 of the set is 4 (which is 12/3)
then the whole set is four of those quarters,
which is 4 times 4
or 16 
Or of course do it PsyDAG's way if you already know the rules of algebra.