A restaurant collected data on customer satisfaction ratings, on a scale from 1 (very dissatisfied) to 5 (very satisfied). The results are shown in the frequency table.
| Rating | Frequency |
|---|---|
| 1 | 5 |
| 2 | 10 |
| 3 | 15 |
| 4 | 12 |
| 5 | 8 |
What percentage of the customers gave a satisfaction rating of 4 or 5?
