Percent off a price
Every "P% off" page on this site, grouped by discount. 100 worked prices — or type your own into the calculator.
SOURCE·Arithmetic only — no external rate·REVIEWED JUL 2026
30% off 80 leaves 56 to pay — you save 24.
How percent off a price is worked out
- Subtract the discount P from 100. A 30% discount leaves 70 — the percentage of the price you still pay.
- Divide that by 100 and multiply the original price N by it. Working out what you pay directly is fewer steps, and fewer steps is fewer mistakes, than working out the saving and subtracting it.
- The saving is the difference between the original price and what you pay — shown separately so both numbers are on the page.
- The discount always applies to the original price, never to a price that has already been discounted. Two stacked discounts multiply; they do not add.
amount to pay = N × ((100 − P) ÷ 100) saving = N × (P ÷ 100)
Full method, rounding and worked examples →
SOURCE·Arithmetic only — no external rate·REVIEWED JUL 2026
The whole discount ladder on $100
Your discount is highlighted. Reading down the “you pay” column is the fastest way to sanity-check a sale sign — if the shelf price does not appear here, the sign is not describing the discount it claims.
| Discount | You pay | You save | Of the price |
|---|---|---|---|
| 5% off | $95 | $5 | 95% |
| 10% off | $90 | $10 | 90% |
| 15% off | $85 | $15 | 85% |
| 20% off | $80 | $20 | 80% |
| 25% off | $75 | $25 | 75% |
| 30% off | $70 | $30 | 70% |
| 40% off | $60 | $40 | 60% |
| 50% off | $50 | $50 | 50% |
| 60% off | $40 | $60 | 40% |
| 70% off | $30 | $70 | 30% |
| 75% off | $25 | $75 | 25% |
| 80% off | $20 | $80 | 20% |
| 90% off | $10 | $90 | 10% |
SOURCE·Arithmetic only — no external rate·REVIEWED JUL 2026
Every worked discount on this site
Grouped by discount, then by price. Nothing here is more than one click away.
10% off a price
15% off a price
20% off a price
25% off a price
30% off a price
40% off a price
50% off a price
60% off a price
70% off a price
75% off a price
The four percentage calculations, and when each one applies
Every percentage question you will ever meet is one of four shapes. Naming the shape first is what stops the classic mistakes — and it is why this site keeps the four apart instead of putting one box on the page and hoping.
P% of N. Tips, commission, deposits, interest. 15% of $200 → $30.
P% off N. Sales and discounts — compute what you pay, not what you save. 30% off $80 → $56.
A is what % of B. Test scores, market share, progress. 42 of 60 → 70%.
% change. Price rises, growth, drops. 80 → 100 is +25%; 100 → 80 is −20%.
The base is everything
Nearly every percentage error is a wrong base — dividing by the new value instead of the old one, or taking a percentage of the discounted price instead of the original. The rule that fixes all of them: the base is the number the percentage is “of”, which in change problems is always the value you started from.
It is also why percentages do not add. A 20% rise followed by another 20% rise is not 40% — it is 44%, because the second rise acts on a bigger base (1.2 × 1.2 = 1.44). Compounding is just this effect repeated.
Mental shortcuts that survive real life
- 10% is one decimal shift. 10% of $87.50 is $8.75. Nearly everything builds from this: 5% is half of it, 20% is double, 15% is one-and-a-half.
- x% of y equals y% of x. 8% of 25 feels hard; 25% of 8 is obviously 2. Same number.
- For discounts, think “what fraction do I pay”. 25% off means you pay ¾. A $59.99 jacket at 25% off is about $45 before you reach for a phone.
Percentage questions, answered
How do I work out a percentage of a number?
How do I take a percentage off a price?
How do I work out what percent one number is of another?
How is percentage change calculated?
Why is a 50% increase not cancelled by a 50% decrease?
What is a percentage point?
Does the calculator store what I type?
Where a percentage usually goes next
Ranked by what people actually reach for after this one — not alphabetically. Each line says what the next tool adds that this one cannot.
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JUL 2026 Invoice generatorA GST-compliant tax invoice with your details on it, as a PDF, with nothing to sign up for.
JUL 2026 Rate calculatorWhat you have to charge per hour once holidays, downtime and overheads are counted.
JUL 2026 Receipt makerProof of payment with the GST split out the way IRD expects to see it.
JUL 2026 Day counterDays between two dates, working days only, and every NZ public holiday.
JUL 2026See all 10 free tools in one list →
These tools are free and always will be. Built by Amit Sharma — an Auckland real-estate agent and marketer followed by 214K across YouTube, Facebook, Instagram and TikTok.
