Question 29848
3:15::60:_____
: is to
:: as
this is an analogy, like finger:hand::toe:foot
it shows a comparison.  A better way to write this ...
: is /
:: is =
{{{ 3/15 = 60/x }}} you are finding equivalent fractions :)
since 3*20 = 60
then 15 * 20 = x
300 = x