Final answer:
Normal blood glucose levels should be between 60-90 mg/100 ml of blood in the fasting or post-absorptive state, and between 100-140 mg/100 ml in the post-prandial state.
Step-by-step explanation:
The normal blood glucose levels should be between 60-90 mg/100 ml of blood in the fasting or post-absorptive state, and between 100-140 mg/100 ml in the post-prandial state. These ranges are considered normal for healthy individuals. It is important to note that blood glucose levels can vary depending on various factors such as nutritional state and time since eating.