Help
Calculate the new value after decreasing an original amount by a specific percentage.
Practical Uses
- Budget Cut:
A £8,000 [Original] wedding budget cut by 25% [Decrease] becomes what [New]?
£6,000 - Employee Reduction:
A 500 [Original]-person tech startup reduced by 10% [Decrease] leaves how many people [New]?
450 people - Energy Savings:
A £150 [Original] summer energy bill reduced by 18% [Decrease] becomes what [New]?
£123 - Sale Discount:
A £250 [Original] winter jacket with a 30% [Decrease] discount costs what [New]?
£175 - Share Price Drop:
A £40 [Original] energy share declining by 12% [Decrease] becomes what [New]?
£35.20 - Weight Loss:
Weighing 82 [Original] kg and losing 15% [Decrease] for summer leaves what weight [New]?
70 kg
How to Use
- Enter the original value in the first box.
- Enter the decrease percentage in the second box.
- The new value (after decrease) appears instantly.
- Check "Round" if you want to keep the result to two decimal places.
- Save it to your list with Enter or the "Save calculation" button.
How It Works
The Decreased Value calculator uses this formula:
Example: What is 100 decreased by 25%?
100 minus 25% equals 75.
What Is a Decreased Value?
Definition
Calculating a decreased value means finding out what stays after a percentage is taken away. It sits behind every “20% off” or “Save 40% today” sign and also powers depreciation schedules, weight-loss tracking, and budget cuts. When something drops by a percent, the useful number is the piece you still pay or keep. If a jacket is 30% off, you’re paying the remaining 70%; if a laptop loses 25% of its value each year, you retain 75% after year one. Thinking in what remains keeps you from being dazzled by big discount claims and shows the real cash leaving your wallet. It speeds up mental math—15% off means pay 85%—and keeps expectations realistic when drops stack: two 20% cuts leave 64%, not 60%.
Common Applications
- Shopping Sales: Determining the final price you pay at the till after applying a store voucher or holiday discount.
- Car Depreciation: Estimating the current resale value of a vehicle after it has lost a percentage of its worth over time.
- Weight Loss Goals: Tracking your new body weight after losing a targeted percentage of body mass.
- Inventory Clearance: Calculating liquidation prices when a store needs to sell off stock quickly by slashing prices.
- Subscription downgrades: Estimating a reduced bill when cutting premium add-ons by a given percent.
- Energy savings: Estimating how much electricity cost remains after a 12% efficiency improvement.
Mathematical Context
Remaining = (1 − Percent/100) × Original Think in what is left. Take the remaining percent, turn it into a decimal, and multiply by the original price. Example: 30% off means 70% remains, so 0.70 × £120 = £84. If you only know the pounds saved, divide the savings by the discount rate to find the starting price. When two discounts stack, just remember you keep less: a 20% cut then another 10% means you pay about 72% of the original. The calculator handles the multiplication; you just need to know you pay what's left, not what was removed.
Need more percentage tools?
- Basic Percentage Calculator
For discounts or taxes. - Part-to-Whole Percentage
Find what % one number is of another. - Original Value Calculator
Reverse a percentage to the original amount. - Percentage Change Calculator
Work out increases or decreases. - Increased Value Calculator
Calculate value after percentage increase. - Original Before Increase Calculator
Find original amount before percentage increase. - Original Before Decrease Calculator
Find original amount before percentage decrease. - Specialized Calculators (63+)
Practical everyday calculations for real-life scenarios.
Requirements and Important Information
- No installation required – works directly in your browser.
- Compatible with all modern browsers (Chrome, Firefox, Safari, Edge).
- Calculations are performed locally – no data is sent to any server.
- Your saved calculations are stored only on your device.
Each calculator stores up to 20 most recent calculations, automatically removing the oldest entries when this limit is reached. - Works offline after the initial page load.
- Supports both desktop and mobile devices.
- No account or login required.
Helpful Calculator Features
- Instant results that appear as you type—no delays.
- Round toggle to keep results neat (2 decimal places).
- Copy results to clipboard with a single click.
- Saved calculations that persist between sessions.
- Clear visual formulas to understand the maths.
- Mobile-friendly interface that works on all devices.
- Dark mode support for comfortable viewing.
- Keyboard shortcuts for faster calculations.