What is the Percent of a Number Calculator?
This calculator answers the everyday question "what is p% of n?" — for example, what is 20% of 150? It converts the percentage into a decimal and multiplies it by your number, giving you an exact answer instantly. It works for any percentage (including values over 100% or fractional percents) and any number, positive or negative.
How to use it
Enter the percentage in the first field (just the number, without the % sign) and the number you want the percentage of in the second field. The result updates to show the exact product. For instance, to find 8% of a $1,250 bill, type 8 and 1250.
The formula explained
The core formula is:
$$\text{result} = \frac{p}{100} \times n$$
A percentage is simply a fraction out of 100. Dividing the percent by 100 turns it into a decimal (20% becomes 0.20), and multiplying that decimal by your number scales it down to the portion you want.
Worked example
Suppose you want to find 20% of 150. First convert the percent: \(20 \div 100 = 0.20\). Then multiply: \(0.20 \times 150 = 30\). So 20% of 150 is 30.
FAQ
Can I use percentages over 100%? Yes. \(150\% \text{ of } 80 = 1.5 \times 80 = 120\). The calculator handles any value.
What about decimals like 7.5%? Decimal percentages work fine — \(7.5\% \text{ of } 200 = 15\).
How do I reverse this to find what percent one number is of another? Use the formula \((\text{part} \div \text{whole}) \times 100\); this tool instead finds the part given the percent and whole.
