To convert \( \frac{27}{50} \) to a decimal using long division, we can set up the division of 27 by 50.
- Since 27 is less than 50, we start by placing a decimal point and adding a zero, making it 270 (i.e., 27.0).
- Now, 50 goes into 270 five times (since \( 50 \times 5 = 250 \)).
- Subtract 250 from 270, which gives us 20.
- Bring down another zero (making it 200).
- Now, 50 goes into 200 exactly four times (since \( 50 \times 4 = 200 \)).
- Subtract 200 from 200, which gives us 0.
So, the result is:
\[ 27 \div 50 = 0.54 \]
The decimal representation of \( \frac{27}{50} \) is 0.54.
Thus, the correct answer is 0.54.