1. What is Removal Percentage?

The removal percentage calculates how much of a substance has been removed or reduced from its initial value. It's commonly used in filtration, purification, and efficiency calculations.

2. How Does the Calculator Work?

The calculator uses the removal percentage formula:

Where:

• Initial — The starting value before removal
• Final — The remaining value after removal

Explanation: The formula calculates the percentage difference between the initial and final values, showing what portion was removed.

3. Importance of Removal Percentage

Details: Removal percentage is crucial for evaluating the efficiency of processes like water treatment, air filtration, chemical purification, and waste reduction.

4. Using the Calculator

Tips: Enter the initial and final values. Both must be positive numbers, and the initial value must be greater than zero. The final value should be less than or equal to the initial value.

5. Frequently Asked Questions (FAQ)

Q1: Can the removal percentage be negative?
A: Yes, a negative percentage indicates the final value increased rather than decreased.

Q2: What does 100% removal mean?
A: 100% removal means complete elimination (final value = 0).

Q3: How is this different from percentage change?
A: Removal percentage specifically measures reduction, while percentage change can measure either increase or decrease.

Q4: What units should I use?
A: The units don't matter as long as initial and final values use the same units (mg/L, ppm, etc.).

Q5: Can I use this for efficiency calculations?
A: Yes, removal percentage is often used to measure process or filter efficiency.