150.
The upper right corner is that point. You can simply read the graph.
20%.
20,000 times 0.8 is 16,000, so the decreased value that was lost was 20% of the original price.
10:100 or 10%
The relative frequency of the people who visited the gift shop AND did not watch the film was .10 which translates to 10:100 which can also be represented as 10%.
Hope that helps.
