Question

if 21 is added in a number then number becomes 275/2percent of itself .find the number.​

Answer 1

x+21= 275/2 % of x

x +21= 275/200 *x

x=56

Answer 2

The unknown number is 56.

Step-by-step explanation:

Let x be the unknown number.

It is given that if 21 is added in a number then number becomes 275/2 percent of itself .

x + 21 = 275/2% of x

$x+21=\dfrac{275}{2}\times \dfrac{1}{100}x$

$x+21=\dfrac{11}{8}x$

Multiply both sides by 8.

$8(x+21)=11x$

$8(x)+8(21)=11x$

$168=11x-8x$

$168=3x$

Divide both sides by 3.

$56=x$

Therefore, the unknown number is 56.

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Twenty percent of a number when added to 20 becomes the number itself. Find the number

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