What is x when 99 divided by x equals 8?

To find the answer, just divide the dividend by the quotient: 99 ÷ 8 = 12.375

To prove this, let's compute 99 divided by 12.375: $\frac{99}{12.375} = 8$

How does it work?

Asking what the value of x could be when 99 divided by x gives a result of 8, is equivalent to solving the following equation:

$\frac{99}{x} = 8$

Multiply both sides by x: $\frac{99 x}{x} = 8 x$
$\frac{99 x}{x}$ is equivalent to $\frac{x}{x} \times 99$ , which simplifies to $1 \times 99$ (or just $99$ ).
Thus, the equation becomes: $99 = 8 x$
To find x, divide both sides by 8: $\frac{99}{8} = \frac{8 x}{8}$
Which gives, after simplification: $12.375 = x$ (or $x = 12.375$ )

So, if the dividend is 99 and the quotient is 8, the divisor is 12.375.