To convert 25° 45' to decimal, we first note that there are 60 minutes in a degree. So, to convert minutes to degrees, we divide by 60. Thus,
25° 45' = 25 + 45/60 degrees
Simplifying,
25° 45' = 25 + 0.75 degrees
Combining the whole and fractional parts, we get:
25° 45' = 25.75 degrees
Therefore, the answer is: 25.75°.