### Home > MC2 > Chapter 5 > Lesson 5.1.1 > Problem5-12

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.

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.

$\frac{2}{36} \text{ or } \frac{1}{18}$