Question

Which number is not equal to 225%?its is exercise number 5

Answer 1

To do this, you can first convert the percentage form to its decimal form, like this

`225\text{\%}=(225)/(100)=2.25`

Now, you can convert the numbers that are possible answers into their decimal form, like this

Option A.

`2(1)/(4)=(2\cdot8+1)/(4)=(8+1)/(4)=(9)/(4)=2.25`

Option B.

`(9)/(4)=2.25`

Option C.

`(50)/(40)=(5\cdot10)/(4\cdot10)=(5)/(4)=1.25`

Option D.

`(45)/(20)=(9\cdot5)/(4\cdot5)=(9)/(4)=2.25`

Therefore, the number that is not equal to 225% is 50/40 and the correct answer is C. 50/40.