Question

find the ratio of the total numbers of the prime numbers to the total numbers of the composite number between 1 to 100. 1 and 100 also include.

Answer 1

Prime numbers between 1 and 100 are 25
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, and 97.
Composite numbers = 74(as 25 are prime and 1 is neither prime nor composite so 100-25-1)
Ratio of prime numbers to composite numbers between 1 and 100 is
$\frac{prime \: numbers \: }{composite \: numbers} \\ \frac{25}{74}$