Question 915481
{{{n/d = 1/4}}} d = 4n
{{{(n+3)/(d-3) = 1/3}}}
{{{(n+3)/(4n-3) = 1/3}}}
3(n+3) = 4n - 3
12 = n
12/48 the original fraction
and...checking
 15/45 = 1/3