The formula to calculate the duration percentage (DUP) is:
\[ DUP = \frac{CT}{TT} \times 100 \]
Where:
Let's say the current time is 30 minutes, and the total time is 60 minutes. Using the formula:
\[ DUP = \frac{30}{60} \times 100 \]
We get:
\[ DUP = 50 \]
So, the duration percentage (\( DUP \)) is 50%.