1/4, 1/2, 3/4, 7/8 are the missing fractions are 0 and 1.
0 is the beginning of the number line, and it represents nothing. It can also be thought of as the fraction 0/1, which means that there are 0 parts out of a total of 1 part.
1 is the end of the number line, and it represents the whole. It can also be thought of as the fraction 1/1, which means that there is 1 part out of a total of 1 part.
Fractions can be represented on a number line by dividing the line segment between two whole numbers into equal parts. The denominator of the fraction represents the number of equal parts, and the numerator of the fraction represents the number of parts that are shaded.
For example, the fraction 1/2 can be represented on a number line by dividing the line segment between 0 and 1 into two equal parts. The first part is shaded, and the second part is not shaded.
The image shows a good example of how to represent fractions on a number line. The line segment between 0 and 1 is divided into four equal parts, and the fractions 1/4, 1/2, 3/4, and 7/8 are marked accordingly.