Final answer:
Pancreatic cancer located at the head of the pancreas is relatively common.
Step-by-step explanation:
Pancreatic cancer is a type of cancer that affects the pancreas, an organ located in the upper abdomen behind the stomach. In this case, the pancreatic cancer is located at the head of the pancreas. Pancreatic cancer is relatively rare before the age of 40 and occurs most often after the age of 60.
While there isn't an exact percentage given in the information provided, it is mentioned that pancreatic cancer located at the head of the pancreas is relatively common. Therefore, it is safe to say that a majority of pancreatic cancers are likely located at the head of the pancreas.