Percent Off Calculator
Sale Price & Savings
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SALE
Final Price
$0.00
You Save: $0.00
How to Calculate a Discount (The Formula)
Calculating a "Percent Off" price is a two-step process. You first determine the value of the discount, and then subtract it from the original price.
Savings = Price × (Percentage ÷ 100)
Example: 25% off a $60 jacket.
- Convert 25% to a decimal: 0.25.
- Multiply: $60 × 0.25 = $15 (This is your savings).
- Subtract: $60 - $15 = $45 (Final Price).
The "Mental Math" Trick (10% Rule)
You don't always have a calculator handy in the store. The easiest way to estimate a discount is to find 10% first.
Step 1: Move the decimal point one spot to the left.
- 10% of $50.00 is $5.00
- 10% of $24.99 is $2.50
Step 2: Multiply to find your target percentage.
- 20% off: Double the 10% number. ($5 x 2 = $10).
- 30% off: Triple the 10% number. ($5 x 3 = $15).
- 5% off: Cut the 10% number in half. ($5 / 2 = $2.50).
The Psychology of Pricing
Retailers use specific math tricks to make deals look better than they are.
The Rule of 100:
• For items under $100, stores use Percentages ("20% Off!"). It sounds like a bigger number than "$5 Off."
• For items over $100, stores use Dollars ("$500 Off!"). It sounds like more money than "15% Off."
• For items under $100, stores use Percentages ("20% Off!"). It sounds like a bigger number than "$5 Off."
• For items over $100, stores use Dollars ("$500 Off!"). It sounds like more money than "15% Off."
Percent Off vs. Price Drop
What is the difference? The formula is simply reversed. If a TV drops from $1,000 to $800, what was the percentage discount?
Formula: (Original - New) ÷ Original
- Difference: $1,000 - $800 = $200.
- Calculation: $200 ÷ $1,000 = 0.20.
- Result: 20% Off.
Quick Reference Table
| Discount | $50 Item | $100 Item | $250 Item |
|---|---|---|---|
| 10% Off | $45.00 | $90.00 | $225.00 |
| 20% Off | $40.00 | $80.00 | $200.00 |
| 30% Off | $35.00 | $70.00 | $175.00 |
| 50% Off | $25.00 | $50.00 | $125.00 |