Draw a horizontal line on a piece of paper. This will be your number line.
Make two vertical tick marks on the line, one near the left side of the paper, the other near the right.
Label the tick mark on the left with a "0" and the tick mark on the right with a "1."
Determine the denominator of the fraction. This is the bottom number and represents how many pieces make up the whole.
Using a ruler, measure out the number of segments along the entire length between 0 and 1, making a smaller horizontal mark at the end of each piece. The beginning of the first small piece will start at the 0 mark and the end of the last small piece will be at the 1 mark. For example, if the denominator is an 8, there will be 8 segments of equal length, each with its own smaller tick mark, between 0 and 1.
Label each of the small tick marks from "1" to the number of segments determined by the denominator. The last segment should end at the right-hand tick mark denoted as "1."
Determine the numerator of the fraction. This is the top number and represents how many of the pieces you have.
Draw a horizontal line over the number line itself until you reach the number in the numerator. For example, if the numerator is 5, draw a line from the 0 to the 5th small tick mark between the 0 and 1. Using the denominator from earlier, this line would represent the fraction 5/8.