Express the following as a fraction in simplest form :

0.345

We have:

0.345

There are 3 decimal places, so we remove the decimal point and divide by 1000.

$\phantom{=} 0.345 = \dfrac{345}{1000} \\[1em] = \dfrac{69}{200} \quad \text{[Dividing both by 5]}$

∴ The answer is $\dfrac{69}{200}$