To order the numbers from greatest to least, let's first convert all the numbers into decimal form where necessary.
- 18 (already in decimal form)
- -18.75 (already in decimal form)
- 0.72 (already in decimal form)
- -12/16 can be simplified to -0.75 (since -12 divided by 16 is -0.75).
- 18.65 (already in decimal form)
Now, we have the following decimal numbers to order:
- 18
- 18.65
- 0.72
- -0.75
- -18.75
Now, putting them in order from greatest to least:
- 18.65
- 18
- 0.72
- -0.75
- -18.75
So, the final order from greatest to least is:
18.65, 18, 0.72, -0.75, -18.75