21 1/2 13 5/16

This appears to be two separate measurements. Please provide more information or context so I can better understand how to assist you.

The numbers you provided are in mixed fractions form. To perform any operations or comparisons with these numbers, it is recommended to convert them into improper fractions or decimals. I will demonstrate how to convert them all into decimals for ease of calculation.

To convert a mixed fraction into a decimal:
1. Multiply the whole number by the denominator.
2. Add the product to the numerator.
3. Divide the sum by the denominator.

Let's convert the mixed fractions into decimals:
21 1/2 = (21 * 2 + 1) / 2 = 43 / 2 ≈ 21.5
13 5/16 = (13 * 16 + 5) / 16 = 213 / 16 ≈ 13.313

So, the numbers you provided can be written as decimals as follows:
21 1/2 ≈ 21.5
13 5/16 ≈ 13.313