Question

Three tenths of a number is 2.1 . Determine the number

Answer 1

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

Answer 2

Answer:

The number is 7.

Step-by-step explanation:

Let the number be x.

Three tenths of a number is 2.1 .

Mathematically we can denote this as:

$\frac{3}{10}\times x=2.1$

Now solving for x, we have ;

$3x=2.1\times10$

$3x=21$

Dividing both sides by 3;

x = 7

Hence, the number is 7.