Final answer:
A common method for presenting customer rating data, such as the percentage of participants who rated a service as good or excellent, is using a pie chart or a bar graph. These visual tools are useful for displaying the proportions of each rating on an ordinal scale.
Step-by-step explanation:
The common method for presenting data to indicate the percentage of participants who rated the service as good or excellent is typically a pie chart or a bar graph. For categorical data on an ordinal scale, like the one described with ratings 1 to 5, a pie chart is often effective because it visually represents proportions of the whole and can be used to show the percentages of respondents in each category. Thus, if you wish to display the information in a way that clearly defines the percentage of customer ratings that were 4 or 5, a pie chart would allow viewers to easily discern this information.
Alternatively, a bar graph could also be used, with the height of the bars representing the percentage of respondents for each category. This can be useful if you want to compare the ratings directly with one another. However, ensure that with either method, the presentation is clear, with percentages labeled and the chart's elements (such as slices or bars) clearly distinguishable from each other.