Question

Three tenths of a number is 2.1 . Determine the number

Answer 1

The number is 7.

Explanation:

Let the number be x.

Three tenths of a number is 2.1 .

Mathematically we can denote this as:

`(3)/(10)* x=2.1`

Now solving for x, we have ;

`3x=2.1*10`

`3x=21`

Dividing both sides by 3;

x = 7

Hence, the number is 7.

Answer 2

3/10 N = 2.1

MULTIPLY by 10/3 to each side

10/3 * 3/10 n = 2.1 * 10 /3

n = 2.1 * 10/3

n = 21/3

n =7