What is the range of normal systolic and diastolic blood pressure ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Blood Pressure**: Blood pressure is measured in millimeters of mercury (mmHg) and is expressed as two numbers: systolic and diastolic. The systolic pressure is the higher number, indicating the pressure in the arteries when the heart beats. The diastolic pressure is the lower number, indicating the pressure in the arteries when the heart is at rest between beats.

2. **Normal Blood Pressure Range**: The normal range for systolic blood pressure is typically between 90 to 120 mmHg, while the normal range for diastolic blood pressure is between 60 to 80 mmHg.

3. **Combining the Values**: Therefore, a normal blood pressure reading is usually expressed as a fraction, such as 120/80 mmHg, where 120 is the systolic pressure and 80 is the diastolic pressure.

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