Question 993526
You described {{{2&1/2+(3/4)(2&1/2)-3/4}}}


Lowest common denominator will be 8; and you might or might not need to see how that works.


Converting mixed numbers into improper fractions.
{{{5/2+(3/4)(5/2)-3/4}}}


{{{(5/2)(4/4)+(3*5)/(2*4)-(3/4)(2/2)}}}


{{{20/8+15/8-6/8}}}


{{{29/8}}}


{{{highlight(3&5/8)}}}


If not what you expected, then show or say exactly what you actually are starting with.