Is there a quantitative measure I can use in my results for an open ended question in user testing?

Is there a quantitative measure I can use in my results for an open ended question in user testing? For example, if I ask the participant during the testing "Can you tell me, in your own words what this page is trying to tell you." the success will be them correctly explaining the info in the page. But when I come to present this information to other stakeholders, is there a way to represent the responses in a quantitative way?

The only measure I can think of is 3 out of 5 participants correctly described the info on the page.

My other sections in the user testing are marked out of a scale of 0 to 3. With 0 being unsuccessful, 1-2 needing a degree of help, and 3 being successful. Can I use a similar system for the above open ended question?