What is x when 15 divided by x equals 53?

To find the answer, just divide the dividend by the quotient: 15 ÷ 53 = 0.28301886792453

To prove this, let's compute 15 divided by 0.28301886792453: $\frac{15}{0.28301886792453} = 53$

How does it work?

Asking what the value of x could be when 15 divided by x gives a result of 53, is equivalent to solving the following equation:

$\frac{15}{x} = 53$

Multiply both sides by x: $\frac{15 x}{x} = 53 x$
$\frac{15 x}{x}$ is equivalent to $\frac{x}{x} \times 15$ , which simplifies to $1 \times 15$ (or just $15$ ).
Thus, the equation becomes: $15 = 53 x$
To find x, divide both sides by 53: $\frac{15}{53} = \frac{53 x}{53}$
Which gives, after simplification: $0.28301886792453 = x$ (or $x = 0.28301886792453$ )

So, if the dividend is 15 and the quotient is 53, the divisor is 0.28301886792453.