Question

A number consists of 20 plus 20% of its value. The number is ___.

Answer 1

Let the number be x,
x = 20 + 20% of x
x = 20 + 20x/100
100x = 2000 + 20x
80x = 2000
x = 2000/80 = 25  Ans.

Answer 2

Answer:

The number which has 20 added to its 20% of its value is 25.

To find:

The value of the number x.

Solution:

Let the number be x

Given, 20 is added to the 20% of the number. Here, we considered it as x.

$\begin{array} { c } { x = 20 + 20 \% \text { of } x } \\\\ { x = 20 + \frac { 20 } { 100 } \times x } \\\\ { x = 20 + \frac { 1 } { 5 } \times x } \\\\ { x = \frac { 100 + x } { 5 } } \\\\ { 5 x = 100 + x } \\\\ { 5 x - x = 100 } \\\\ { x = \frac { 100 } { 4 } = 25 } \end{array}$

Hence, the number is 25