Place the following numbers in order from greatest to least:

-8.2, 0.4, -2 1/2, 2.4

2.4, 0.4, -2 1/2, -8.2

To place the numbers in order from greatest to least, we need to compare them. Let's arrange them in descending order:

1. The greatest number is 2.4
2. Next is 0.4
3. Then, -2 1/2
4. Finally, the smallest number is -8.2

So, the numbers in order from greatest to least are: 2.4, 0.4, -2 1/2, -8.2.

To place these numbers in order from greatest to least, we need to compare their values.

The given numbers are: -8.2, 0.4, -2 1/2, 2.4

1. Let's start by comparing -8.2 and 0.4. Since -8.2 is a negative number and 0.4 is positive, we know that 0.4 is greater than -8.2.

The updated order becomes: 0.4, -8.2, -2 1/2, 2.4

2. Next, let's compare 0.4 and -2 1/2. To compare these numbers, we need to convert -2 1/2 to decimal form.

-2 1/2 = -2.5

Since -2.5 is less than 0.4, we know that 0.4 is greater.

The updated order becomes: 0.4, -8.2, -2.5, 2.4

3. Finally, let's compare 0.4 and 2.4. Since 2.4 is greater than 0.4, we can conclude that 2.4 is the greatest number in the list.

The final order from greatest to least is: 2.4, 0.4, -8.2, -2.5