Percentage Decrease Calculate
The Percentage decrease Calculator calculates the negative difference from one value to another in the form of a percentage. You have to enter starting value and final value to get the percentage decrease
How to Calculate Percentage Decrease
The percentage Decrease Formula is
Percent decrease = [(original value – new value)/original value] * 100
- First value minus the second value
- Divide the result by the absolute value of the starting value
- Multiply by 100 to get a percentage decrease
- If the percentage is negative it means that is an increased value \
Percentage Decrease Calculator Example
You have a lamp with a 60-watt light bulb. Your lamp uses 60 watts of electricity per hour. You’re thinking of replacing the bulb with an LED light bulb that uses 8 watts of electricity per hour. What is the percentage decrease in the lamp’s hourly energy use if you switch to an LED light bulb?
Percentage Decrease = [ (Starting Value – Final Value) / |Starting Value| ] × 100
60 – 8 = 52
52 / 60 = 0.8667
0.8667 × 100 = 86.67%
What is the percentage decrease from 100 to 10?
The percentage decrease from 100 to 10 is equal to 90%. Indeed, we get:
(100 - 10) / 100 = 0.9 and
0.9 × 100% = 90%, as we claimed.
What is the percentage decrease from 5000 to 1000?
The percentage decrease from 5000 to 1000 is equal to 80%. Indeed, we get:
(5000 - 1000) / 5000 = 0.8 and
0.8 × 100% = 80%, as we claimed.