Pl ! i need someone to plz explain how to do this bc idk how and it’s rlly harddd! i keep trying to do it but i don’t get it

Need on this one asap im almost done with this subject

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.