Answer:
16 2/3 %
Explanation:
To put this in a percentage, they need to have the same units.
Let convert days to hours
1 day = 24 hours
Multiply by 3
3 days = 72 hours
The percentage is part over whole
12 hours / 72 hours
We can simplify by dividing top and bottom by 12
1/6
This is a fraction, change this to a decimal
.166666666
Now multiply by 100
16.666666 %
16 2/3 %