Question

Find the number, if 2 1/4 of it is 27.

Answer 1

12

Explanation:

Use cross-multiplication method:

If 2.25 is 27, 1 is x.

So divide 27 by 2.25 which gives 12.

Answer 2

12

Explanation:

Let x be the number we are looking for. Using informations in the task, we get following equation which we suppose to solve for x

`2(1)/(4) x=27`

Now, we will write mixed number as a fraction and get

`(9)/(4) x=27`

In the next step, we will multiply both sides of the equation by 4 and get

`9x=27*4\\x=\frac{27*4} {9}\\x=12`

So, required number is 12.