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Simply add up the primes - those numbers other than 1 whose only factors are 1 and themselves. 2,3,5,7,11,13,17,19,23,29 are all the primes from 1 to 30. There are 10 of them, and the set of integers from 1 to 30 encompasses 30 numbers, so 1/3 of the integers from 1 to 30 are prime. Technically there are infinite NUMBERS between 1 and 30 (0.1, 9.57, 0.000001, ...) but only 30 integers (1,2,3, ...). If the question is phrased with the word "numbers" and not "integers" then the answer should technically be 10 primes divided by infinite numbers, and anything over infinity is 0, so your answer would be 0. So answer either 1/3 or 0; if you haven't really talked about infinity then it is probably 1/3 they are looking for.
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What fraction represents the number of prime numbers from 1-20?
2/5 of the numbers from 1 to 20 are prime numbers
Write the natural numbers 1to15 what fraction of them are prime numbers what fraction of them are the composite number?
2/5 are prime, 8/15 are composite (and 1/15 is neither).
What fraction of numbers from 1 to 15 are prime numbers?
The prime numbers are: 2 3 5 7 11 and 13 so therefore as a fraction of 15 it is 6/15 or 2/5 simplified
What is the prime numbers of 20-30?
Prime numbers only have factors of 1 and themselves: 23, 29
What are the prime numbers between 30 and 40?
The prime numbers between 30 and 40 are 31, 37. A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. In this range, 31 and 37 are the only prime numbers because they are not divisible by any other numbers except for 1 and themselves.
