Question

15% of which number will be 18 and 12%14.4?
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Answer 1

Answer(s):

15% of 120 = 18

12% of 14.4 = 1.728

Math:

For Question.1:

    Let, x be the unknown number.

∴ 15% of x = 18

⇒  $\frac{15}{100}$ × x  = 18

⇒ x = 18 × $\frac{100}{15}$

Here, 18 and 15 have a common divisor 3.

⇒ x = 6 × $\frac{100}{5}$

∴ x = 120.

For Question.1:

= $\frac{12}{100}$ × $\frac{144}{10}$

After canceling all values.

= $\frac{216}{125}$

= 1.728

Answer 2

Answer:

120.

Step-by-step explanation:

Given :- 15 % of the number = 18, and 12 % of number = 14.4

To Find :- Find the number.

Solution :-

Let the number be x.

Acc. to the question,

15 % of x = 18, and  ------- ( 1 )

12 % of x = 14.4      ------- ( 2 )

⇒ 12 / 100 × x = 14.4

⇒ 12 x = 14.4 × 100

⇒ 12 x = 1440

⇒ x = 1440 / 12

⇒ x = 120.

Now, putting the value of x = 120 in equation ( 1 )  to verify if it equals to 18,

15 % of 120 =  15 / 100 × 120

                   =  1.5 × 12

                   =  18  Hence, verified.

Therefore, the number is 120.

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