Slifto.
Browse Tools

Multi-Mode Percentage Calculator

Math Utility

Calculate percentages easily: find a percentage of a number, percentage increase or decrease, discount prices, and ratio comparisons.

Zero Server Uploads
Runs locally in your browser

1. What is X% of Y?

Find the direct percentage value of a number.

What is% of?
Result
37.5
Formula: (15 ÷ 100) × 250 = 37.5

2. X is what % of Y?

Determine the relative fraction as a percentage.

is what % of?
Result
25%
Formula: (45 ÷ 180) × 100 = 25%

3. Percentage Change (Increase / Decrease)

Calculate the growth or reduction rate between two values.

Fromto
Change Rate
+50.00%
Formula: ((120 - 80) ÷ 80) × 100 = +50%

4. Retail Discount Calculator

Calculate final price and savings after a discount.

Price: $with% OFF
Final Price
$120.00
You Save
$30.00

Everyday Formulas for Percentage Calculations

Percentage of a Value:

Result = (P / 100) × Total

Percentage Ratio:

Percentage = (Part / Total) × 100

Percentage Increase:

Increase = ((New - Old) / Old) × 100

Discounted Price:

Final Price = Original × (1 - (Discount / 100))

Frequently Asked Questions

Common questions about this tool, calculation methods, and privacy.

1How do you calculate a percentage of a number?

To find P% of a number N, multiply the number by the percentage and divide by 100: (P / 100) × N. For example, 15% of 200 is (15 / 100) × 200 = 30.

2How is percentage increase or decrease calculated?

Percentage change is calculated by subtracting the initial value from the new value, dividing by the initial value, and multiplying by 100: ((New - Initial) / Initial) × 100. A positive result indicates an increase; a negative result indicates a decrease.

3How do I calculate a retail sales discount?

Multiply the original price by the discount percentage to find the savings amount, then subtract that from the original price. For example, a $80 item with a 25% discount saves $20, resulting in a final price of $60.

Related In-Browser Tools

Explore more free utilities running directly on your device.