The answer is 0
Put the minus behind the number
$${\mathtt{3}}{\mathtt{\,\small\textbf+\,}}{\mathtt{6}} = {\mathtt{9}}$$
$$2/5+3/4$$
5, 10, 15, 20, 25...
4, 8, 12, 16, 20, 24...
$$2*5/4*5 + 3*4/4*5$$
= $$10/20 + 12/20$$
=$$10+12/20$$
$$22/20$$
Simpified =11/10
So...
Now what?
$${\mathtt{100}}{\mathtt{\,\times\,}}{\mathtt{100}} = {\mathtt{10\,000}}$$
Maths is related to everything, so learn it now and use for the future.
$${\frac{{\mathtt{27}}}{{\mathtt{7}}}}{\mathtt{\,\times\,}}{\mathtt{28}} = {\mathtt{108}}$$