Table cell percentage widths are rounded

It seems like widths for table cells are rounded down when specified as a percentage.
In the following example, the 'AAAA' column in the first two tables has the same width:
```html

table { width: 100%; }
td { border: 1px solid red; }

AAAABBBBCCCC
AAAABBBBCCCC
AAAABBBBCCCC

```
This also happens when using `display:table`, `table-row` and `table-cell` styles. It does not happen with `inline-blocks`.