What part of the segment CD is the segment MN if C (0), M (4), N (7), D (10)?

To find the length of a line segment, subtract the coordinate of the left end from the coordinates of the right end. We get:

CD = 10 – 0 = 10;

MN = 7 – 4 = 3.

To find out what part one number is from another, you need to divide the first number by the second:

MN / CD = 3/10 = 0.3.

Answer: the MN segment is 0.3 (or 3/10) of the CD segment.