Question

If 18% of a number is 72 find the number?​

Answer 1

Step-by-step explanation:

let the unknown no. be x

18%×x=72

18/100×x=72

x=72×100/18

x=4×100

x=400

Answer 2

Required number is 400.

Step-by-step explanation:

Let the required number be x

Now, 18% of x = x * 18/100

= x * 9/50

= 9x/50

According to the question,

9x/50 = 72

or, x = 72 * 50/9

or, x = 8 * 50

or, x = 400

∴ the required number is 400.

Note: To solve this type of problems, remember the following steps -

• consider the number as x, or something else

• find its percentage value

• equate the above value with given value

• calculate carefully step-by-steps

• you find x as a known number

• the problem is solved