Four friends are comparing the amount of dog food their dogs eat per day.

Charlotte's dog eats 10.5 pounds of dog food in 12 days.

Meiling's dog eats 15 pounds of dog food in 16 days.

Amelia's dog eats 4 pounds of dog food in 6 days.

Zahra's Dog eats 6 pounds of god food in 8 days.

Which dog eats the most food, in pounds per day?