4 is half of 8 and in decimal form is 0.5. 3/10 in decimal form is 0.3. Therefore 0.5 is greater than 0.3, so 4/8 is considered to be steeper than 3/10.
so just by your imagination or put (8,4) on "Cartesian coordinate system" and connect it with Origin of coordinates.now put (10,3) on it and do the same.