Put these numbers in order from greatest to

least.
0.8
5
3
15
-
5

15, 5, 3, 0.8, -5.

To put these numbers in order from greatest to least, follow these steps:

1. Identify the largest number among the given numbers: 15
2. The next largest number is 5, which is smaller than 15 but larger than all the other numbers.
3. The next largest number is 3, which is smaller than both 15 and 5.
4. Moving on, we have 0.8, which is smaller than all the previously mentioned numbers.
5. Finally, the smallest number is -5.

Therefore, the numbers in order from greatest to least are: 15, 5, 3, 0.8, -5.

To put these numbers in order from greatest to least, we can simply compare them and arrange them accordingly. Let's go step by step:

1. Start by comparing the numbers 5 and 15. Since 15 is greater than 5, we write 15 first: 15.

2. Next, compare the numbers 3 and 15. Since 15 is still greater than 3, we write 15 next: 15, 3.

3. Now, compare the numbers 0.8 and 15. Since 15 is still greater than 0.8, we write 15 again: 15, 3, 0.8.

4. Moving on, compare the numbers -5 and 15. Since 15 is greater than -5, we write 15 once more: 15, 3, 0.8, -5.

5. Finally, compare the numbers -5 and 0.8. Since 0.8 is greater than -5, we write 0.8: 15, 3, 0.8, -5.

So, the numbers in order from greatest to least are: 15, 3, 0.8, -5.