Order the set of numbers from least to greatest 11/20,1/2,0.51

0.51, 11/20, 1/2

To order the set of numbers from least to greatest, we need to compare their values.

First, let's convert the fractions to decimals:

11/20 = 0.55
1/2 = 0.5

Now we have the following numbers: 0.51, 0.5, 0.55.

Finally, we can arrange them from least to greatest:

0.5, 0.51, 0.55

So, the correct order is 1/2, 0.51, 11/20.