Percentage Calculator
The Percentage Calculator handles the three everyday percent tasks in one place: working out what percent one number is of another, finding a given percent of any number, and calculating the percentage increase or decrease between two values. Results are instant, accurate to two decimal places, and ideal for shopping discounts, grade calculations, tips and business changes.
Frequently Asked Questions
Quick answers to common questions
Q:How do I find what percent one number is of another?
Divide the part by the whole and multiply by 100. For example, 30 out of 200 is (30 ÷ 200) × 100 = 15%. The calculator does this instantly.
Q:How do I calculate a percentage increase or decrease?
Subtract the original from the new value, divide by the absolute original, and multiply by 100. A positive result is an increase, a negative one is a decrease.
Q:When is the percentage calculator most useful?
It's ideal for working out sale discounts, tax and tips, grade percentages, markup and margin decisions, or comparing before-and-after business figures.