Order from least to greatest:

2.1, 3/5, -0.7, 7/10

What do you think, Mae/Raven?

To order these numbers from least to greatest, you need to compare their values. Here's how you can do it:

First, let's convert the fractions into decimal form for easier comparison:
3/5 = 0.6 (divide 3 by 5)
7/10 = 0.7 (divide 7 by 10)

Now, we have the following numbers: 2.1, 0.6, -0.7, 0.7

To start ordering them, we can begin with the negative number, -0.7. It is the smallest value among the given numbers.

Next, we compare the remaining numbers: 2.1, 0.6, and 0.7.

Since 0.6 is the smallest among these three, we arrange them in ascending order as follows: -0.7, 0.6.

Finally, we compare the remaining numbers, 2.1 and 0.7. Since 0.7 is smaller, the final order from least to greatest is: -0.7, 0.6, 0.7, 2.1.