A track team needed to run or jog 20 laps for their practice. Of the total 20 laps, Sara completed 4/5 , Jamie completed 5/8 , Keenan completed 5/9 , Maya completed 0.833, and Trey completed 0.875. Identify the descending numeric order of the laps completed.

To put the laps completed in descending numeric order, we need to convert all the fractions and decimals to a common format.

Sara completed 4/5 of the 20 laps, which is (4/5) * 20 = 16 laps.
Jamie completed 5/8 of the 20 laps, which is (5/8) * 20 = 12.5 laps.
Keenan completed 5/9 of the 20 laps, which is (5/9) * 20 = 11.11 laps.
Maya completed 0.833 of the 20 laps, which is 0.833 * 20 = 16.66 laps.
Trey completed 0.875 of the 20 laps, which is 0.875 * 20 = 17.5 laps.

Now we can order the laps completed from greatest to least:

1. Trey - 17.5 laps
2. Maya - 16.66 laps
3. Sara - 16 laps
4. Jamie - 12.5 laps
5. Keenan - 11.11 laps