Question 343919
First simplify,
{{{10/15=2/3}}}
{{{4/14=2/7}}}
You need a common denominator, {{{3*7=21}}}
{{{2/3=(2/3)(7/7)=14/21}}}
{{{2/3=(2/7)(3/3)=6/21}}}
Put it all together,
{{{10/15+4/14=14/21+6/21}}}
{{{10/15+4/14=(14+6)/21}}}
{{{highlight(10/15+4/14=20/21)}}}