Question 74671
If your problem looks like this 
{{{(5*3)/10-(2*7)/20}}} then you need to find the common denominator
{{{(2/2)((5*3)/10)-(2*7)/20}}} Multiply the 1st term by 2/2
{{{30/20-14/20}}}
{{{(30-14)/20}}}
{{{16/20}}}
{{{8/10}}}Here's the simplified form



If your problem looks like this:
{{{(5+3)/10-(2+7)/20}}}
{{{(2/2)((5+3)/10)-(2+7)/20}}} Multiply the 1st term by 2/2
{{{16/10-9/20}}}
{{{(16-9)/20}}}
{{{7/20}}}Here's the simplified answer.