The ratio of 8 books to 20 books is

(A) 2 : 5 (B) 5 : 2 (C) 4 : 5 (D) 5 : 4

Dear Student

Option (A) is correct here
The comparison of two numbers or quantities by division is known as the ratio. Symbol‘:’ is used to denote ratio.
Ratio of 8 books to 20 books = 8/20
Divide both numerator and denominator by 4.

= 2/5
Therefore, ratio of 8 books to 20 books = 2 : 5

Thanks