Question 162655
5{{{3/4}}} - 2{{{2/5}}}
:
Convert both fractions to improper fractions. Multiply the whole number times the
denominator and add the numerator
{{{23/4}}} - {{{12/5}}}
:
They need to have a common denominator, 20 is a multiple of both denominators
20/4 = 5 and 20/5 = 4, so we have
5*{{{23/20}}} - 4*{{{12/20}}}
which is
{{{115/20}}} - {{{48/20}}} = {{{67/20}}} 
:
Convert this to a mixed number, divide 20 into 67, the remainder is the fraction 
3{{{7/20}}}