Mischievous reading a 200 page story book, I have read 80 pages. What is the ratio of the number of pages I have read to the number of pages I have not read? What is the ratio? What is the percentage of the number of pages I have read?

Mischievous reading a 200 page story book, I have read 80 pages. What is the ratio of the number of pages I have read to the number of pages I have not read? What is the ratio? What is the percentage of the number of pages I have read?

The ratio of the number of pages seen and the number of pages not seen is 80:120 = 2:3, and the ratio is 2 / 3. The number of pages seen is 2 / 5 of the total number of pages

When Tiantian reads a story book, the ratio of the number of pages he has read to the number of pages he has not read is five to seven. How many parts of the book has he read

5/(5+7)=5/12