Jul 6, 2017

$- 0.67$ to 2 decimal places

#### Explanation:

$- 2 \div 3$ is the same as $- \frac{2}{3}$ this is the most precise form of answer.

If you actually do the division you get -0.666666... going on for ever.
Eventually you get fed up with writing the 6's and decide to round the answer. As soon as you do that you introduce an error.

You can also write this as $- 0.6 \overline{6}$ the $\overline{6}$ means that the 6 goes on for ever.

Rounding -0.6666666... to 2 decimal places gives:

$- 0.67$ to 2 decimal places