so lets say you have 1/2 and 3/4. Write them down, not slanted, side by side. Start at the 4 and draw a line to the 1. Multiply them. write the answer above the 1. Now, Start at the 2 and draw a line to the 3. Multiply them. write the answer above the 3. Now compare the answers. that's the answer for the fractions. You must start at a denominator and then go diagonally to the other fractions numerator.