Question

6. What is the percentage of prime numbers from 1 to 10.

Answer 1

SOLUTION :-

First we have to find the number of prime numbers from 1 to 10

Prime number : Number which has only two factors that is 1 and the number itself

So,

1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Prime numbers from 1 to 10 is 4

Now,

Out of 10 numbers, 4 prime numbers can be written as

= $\frac{4}{10}$

Now converting into percentage,

= $\frac{4}{10} \times 100$

= 40%

Hence

The percentage of prime numbers from 1 to 10 is 40%

Answer 2

Answer :

The percentage of prime numbers from 1 to 20 is 40 %.

Step-by-step explanation :

First of all, let's see what is prime number.

Prime Number : The numbers which have only two factors, i.e., 1 and the number itself, is called prime number.

The prime numbers from 1 to 10 are :

1, 2, 3, 4, 5, 6, 7, 8, 9, 10

Here, 2, 3, 5, 7 are the prime numbers.

∴ Prime numbers from 1 to 10 is 4.

Now, converting into fraction ;

Required fraction = 4 / 10

Converting into percentages ;

Required percentage = 4 / 10 * 100

                                    = 40 %

Hence, the percentage of prime numbers from 1 to 20 is 40 %.