Ramona put her dog, Butch, on a diet for 5 months. At the end of the diet, Butch’s total weight change was −11 1/5 pounds. What was Butch’s average weight change each month of the diet?

Ramona put her dog, Butch, on a diet for 5 months. At the end of the diet, Butch’s total weight change was −11 1/5 pounds. What was Butch’s average weight change each month of the diet?