Rows will be in the ratio of 2:3:4

#+ATTR_ODT: :style "GriddedTable"
| <1> | <2> | <3> |
| _a_ | _b_ | _c_ |
| _d_ | _e_ | _f_ |


Rows will be in the ratio of 4:7:10.  Table will occupy 80% of page width.

#+ATTR_ODT: :rel-width 80
#+ATTR_ODT: :widths 3,6,9
#+ATTR_ODT: :style "GriddedTable"
| <1> | <2> | <3> |
| _a_ | _b_ | _c_ |
| _d_ | _e_ | _f_ |