1. What is a Percentage Calculator?

Definition: This calculator computes the percentage that one number represents of another number.

Purpose: It helps users quickly determine percentages for various applications including finance, statistics, and everyday calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \% \) — The calculated percentage
• \( Part \) — The portion of the whole
• \( Whole \) — The total or reference amount

Explanation: The part is divided by the whole and multiplied by 100 to convert it to a percentage.

3. Importance of Percentage Calculation

Details: Percentage calculations are fundamental in finance (interest rates), statistics (data analysis), retail (discounts), and many other fields.

4. Using the Calculator

Tips: Enter the part and whole values (both unitless). The whole value must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: Can I calculate percentage increase/decrease?
A: Yes, use the difference between new and old values as the "part", and the old value as the "whole".

Q2: What if my whole is zero?
A: Division by zero is undefined. The whole must be greater than zero.

Q3: How precise are the results?
A: Results are shown to 2 decimal places for most practical applications.

Q4: Can I calculate reverse percentages?
A: This calculator finds what percent X is of Y. For finding X given a percentage of Y, you would need a different calculation.

Q5: Why is this specifically for UK users?
A: While the math is universal, the formatting and terminology follow UK conventions.