Question

How do you simplify `0.4 div 1.8`?

Answer 1

`2/9` or 0.2222222... written as `0.dot2`
The fraction answer is exact and therefore better.

Explanation:

When working with decimals, you cannot divide BY a decimal.
Change the numbers to:

`0.4/1.8 xx 10/10 = 4/18`

`10/10 = 1` so by multiplying by 1, we are not changing the value of the numbers or the the division, only what they look like.

`4/18 = 2/9`

The answer can be left as `2/9` which is an exact answer, or by dividing 2 by 9, we get the recurring decimal 0.222222.....

`2/9` or 0.2222222... written as `0.dot2`
The fraction answer is exact and therefore better.