### Home > MC2 > Chapter 5 > Lesson 5.1.1 > Problem 5-12

5-12.

**Additional Challenge:** Robert found an old game in a closet and wanted to play it. However, a portion of the spinner shown below could not be read. Find the missing portion of the spinner for Robert. Homework Help ✎

Since the spinner must land on any of the portions, all of the portions must add up to 1 because each of the portions is relative to its probability.

Try finding the difference between 1 and the given probability portions.

Since they have different denominators, you must find a common denominator for all of them and convert them to an equivalent fraction.