Final answer:
Mel used 75% of the toilet paper from the package, calculated using the formula (Part/Total) × 100, where Part is the number of rolls used and Total is the total number of rolls.
Step-by-step explanation:
Mel opened a package of toilet paper and used 6 out of the 8 rolls. To find out the percentage used, we apply the percentage formula which is (Part/Total) × 100.
Here, the Part is the number of rolls used, which is 6, and the Total is the number of rolls in the package, which is 8.
The calculation would be as follows: (6 / 8) × 100 = 75%. So, Mel used 75% of the toilet paper in the package.