The height of Juan's dog=2 feet 3 inches = (2×12+3) inches =27 inches The height of Peter's dog= 9 inches The difference between the heights of Juan and Peter's do cab be obtained by subtracting the two. The difference between the height of two dogs=Height of Juan's dog-Height of Peter's dog =27 inches -9 inches =18 inches

The difference between the heights of Juan and Peter's dogs is 18 inches.