Question 931453
{{{3}}}{{{ 9/10}}} * {{{4}}}{{{ 8/12}}}

convert mix number into improper fraction

recall that {{{3}}}{{{ 9/10}}} is {{{3+9/10=30/10+9/10=39/10}}}

and {{{4}}}{{{ 8/12}}} is {{{4+8/12=48/12+8/12=56/12}}}


{{{(39/10)(56/12)}}}... simplify

{{{(39/10)(cross(56)14/cross(12)3)}}}

{{{(cross(39)13*cross(14)7)/(cross(10)5*cross(3))}}}

{{{(13*7)/5}}}

{{{91/5}}}

as a mixed number 

{{{91/5=90/5+1/5=18+1/5}}}

{{{18}}}{{{1/5}}}