What is x when 18 divided by x equals 99?

To find the answer, just divide the dividend by the quotient: 18 ÷ 99 = 0.18181818181818

To prove this, let's compute 18 divided by 0.18181818181818: $\frac{18}{0.18181818181818} = 99$

How does it work?

Asking what the value of x could be when 18 divided by x gives a result of 99, is equivalent to solving the following equation:

$\frac{18}{x} = 99$

Multiply both sides by x: $\frac{18 x}{x} = 99 x$
$\frac{18 x}{x}$ is equivalent to $\frac{x}{x} \times 18$ , which simplifies to $1 \times 18$ (or just $18$ ).
Thus, the equation becomes: $18 = 99 x$
To find x, divide both sides by 99: $\frac{18}{99} = \frac{99 x}{99}$
Which gives, after simplification: $0.18181818181818 = x$ (or $x = 0.18181818181818$ )

So, if the dividend is 18 and the quotient is 99, the divisor is 0.18181818181818.