One day 176 people visited a small art museum. The ratio of members to nonmembers that day was 5 to 11. How many people who visited the museum that day were nonmembers?

121 non members

Explanation:

Here is one way to do this problem:

Looking at the original ratio 5:11 you can add those numbers together to get the "whole" ratio:

5+11=16

Now you know for every 16 visitors there were 5 members and 11 non-members.