Question 12340
{{{13/100 = 39/x}}}
{{{13x/100 = 39}}}
{{{13x = 39*100}}}
{{{13x = 3900}}}
{{{x = 3900/13}}}
{{{x = 300}}}


or for soemthing this "simple" in structure, you could just scale up the lefthand side as follows...


{{{13/100 = 39/x}}}
{{{39/300 = 39/x}}}


so comparing...x must be 300


jon.