With reference to Figure 1, calculate the three-firm concentration ratio for the UK cinema market. Show your workings and express your answer to two decimal places.
| Cinema Operator | Number of screens |
|---|---|
| Cineworld | 1012 |
| Odeon | 954 |
| Vue | 871 |
| Everyman | 142 |
| Picturehouse | 85 |
| Showcase | 73 |
| Other cinema operators | 1120 |