Answer:
As per the statement:
Dexter read 11 science fiction books and 5 history books.
Lena read 9 science fiction books and 4 history books.
1.
Determine the ratio form:
Science fiction books to history books
Dexter = science book : history book = 11 : 5
Lena= science book : history book = 9 : 4
2.
Write the ratios as fraction
Dexter = [tex]\frac{11}{5}[/tex]
Lena = [tex]\frac{9}{4}[/tex]
