If an item costs $15 with a 20% discount, how much is it?

The discount amount is $3. The final sale price is $15 - $3 = $12.00.

If 20% sales tax is added to $15, what is the total?

The tax amount is $3. The total price is $15 + $3 = $18.00.

Instant In-Browser Math Engine

Calculate 20% of 15 — Result: 3. Step-by-step formula, discount math, and financial examples.

Answer:

Mathematical Formula:

(20 ÷ 100) × 15 = 3

20% (3)100% (15)

Step-by-Step Solution & Formula

1Step 1: Convert the percentage to a decimal by dividing by 100: 20 ÷ 100 = 0.2000

2Step 2: Multiply the decimal by the base number: 0.2000 × 15 = 3

3Conclusion: 20% of 15 is equal to 3.

Real-World Scenarios & Financial Examples

🏷️ 20% Discounted Price:$12.00

📈 20% Added / Sales Tax (VAT):$18.00

💰 Discount / Difference Amount:$3

Drag the slider or change the amount to calculate custom percentages in real-time.

Real-Time Solver

Percentage (20%):20%

Base Number:Total

Calculated Value (20% of 15):

Discount Price$12

With Tax/Tip (+20%)$18

One-click export ready to paste into Excel, Google Sheets, Python, JS, or SQL.

Excel & Google Sheets Formula

=15 * 20%

JavaScript / TypeScript

const result = (15 * 20) / 100; // 3

Python Formula

result = (15 * 20) / 100 # 3

SQL Query

SELECT (15 * 20 / 100.0) AS result;

Percentage & Discount Reference Table for $15

Percentage	Amount	Sale Price (-%)	With Tax (+%)	Quick Link
5%	$0.75	$14.25	$15.75	View
10%	$1.5	$13.5	$16.5	View
15%	$2.25	$12.75	$17.25	View
20%Current	$3	$12	$18	View
25%	$3.75	$11.25	$18.75	View
30%	$4.5	$10.5	$19.5	View
40%	$6	$9	$21	View
50%	$7.5	$7.5	$22.5	View
75%	$11.25	$3.75	$26.25	View
100%	$15	$0	$30	View

Frequently Asked Questions

Everything you need to know regarding specifications, syntax, and security best practices.

To calculate 20% of 15: Divide 20 by 100 to get 0.2000, then multiply by 15. Result: 3.