Question

10% of ___ is 81
A.) 8.1
B.) 81
C.) 810
D.) 8100

Answer 1

the answer is C, to figure it out take all the numbers and multiply by .10

Answer 2

Option C.

Step-by-step explanation:

Let the unknown number be x.

It means 10% of x is 81.

`x* (10)/(100)=81`

`x* (1)/(10)=81`

`(x)/(10)=81`

Multiply both sides by 10 to find the value of x.

`(x)/(10)* 10=81* 10`

`x=810`

The value of x is 810. It means 10% of 810 is 81.

Therefore, the correct option is C.