In a survey of 200 students, their performance in three subjects—Mathematics, Science, and English—was recorded. The data collected showed the following average scores:

• Average Mathematics score: 75
• Average Science score: 85
• Average English score: 70

Each student answered a total of 20 questions in each subject. The total points possible for each question is equal to the average score divided by 20. If students score above the average in Science, but below the average in Mathematics, what is the percentage of questions each student scored correctly in both Mathematics and English combined, overall?