To convert 28 and one-half degrees into degrees and minutes:

1. Split the value into the whole number (28 degrees) and the fractional part (0.5 degrees).
2. Convert the fractional part (0.5 degrees) into minutes: $0.5 \times 60 = 30 \, \text{minutes (prime)}.$

So, 28 and one-half degrees equals 28° 30′.

Let me know if you'd like further clarification!

Related Questions:

1. How do you convert a decimal degree into degrees, minutes, and seconds?
2. What is the process for rounding to the nearest minute?
3. Why are there 60 minutes in a degree?
4. Can you explain converting fractions of minutes into seconds?
5. How is this conversion used in navigation or geography?

Tip: Always ensure you multiply the fractional degree by 60 to accurately determine the minutes.