Browse Definitions :
Definition

percent change (percent difference)

Percent increase and percent decrease are measures of percent change, which is the extent to which a variable gains or loses intensity, magnitude, extent, or value. The figures are arrived at by comparing the initial (or before) and final (or after) quantities according to a specific formula. It is assumed that both the initial and the final quantities are positive (larger than 0).

Suppose a quantity has an initial value of x1, and then increases or decreases to a final value of x2. The percent change, D%, is calculated by finding the difference x2 - x1 (subtracting the initial value from the final value), then dividing the result of this subtraction by x1 (the initial value), and finally multiplying by 100. Expressed as a formula:

D% = 100 (x2 - x1) / x1

If x2 > x1 (the final value is larger than the initial value, representing an increase in the variable quantity), then D% is a positive number. If x2 < x1 (the final value is smaller than the initial value, representing a decrease), then D% is a negative number.

As an example, suppose you buy stock in two companies A and B, both at a price of USD $1.25 per share in January of a given year. Suppose that by July, stock A has risen in value to USD $3.35 per share. Then for stock A:

DA% = 100 ($3.35 - $1.25) / $1.25 = +168%
Percent change is +168%, also expressed as a percent increase of 168%.

Imagine that stock B has fallen to USD $1.00 per share in the same time period. Then for stock B:

DB% = 100 ($1.00 - $1.25) / $1.25 = -20%
Percent change is -20%, also expressed as a percent decrease of 20%.

Percent Increase Calculator

Enter the two numbers to find percent difference (increase or decrease):

to

RESULT: Percentage increase or decrease is:

This was last updated in March 2011

Join the conversation

3 comments

Send me notifications when other members comment.

Please create a username to comment.

I am trying to determine if it more appropriate to calculate percent change or percent difference.

I have 2 different lots of the same reagent. The older one yields 1920. The newer one or more current or second one gives us 2256.

Should it be the difference between or a percent change in yield from yesterday to today?

Cancel
I'm not clear on what the difference is between a percent increase and the percent of another number.

For example, I understand the percent increase from 5000 to 15000 is 200%.

But, what I don't understand is how then 15000 could be 300% of 5000 (100 more).  Can you explain the difference?
Cancel
i don't know the definition of percent of change. Help PLEASE
Cancel

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance as a service (CaaS)

    Compliance as a Service (CaaS) is a cloud service service level agreement (SLA) that specified how a managed service provider (...

  • data protection impact assessment (DPIA)

    A data protection impact assessment (DPIA) is a process designed to help organizations determine how data processing systems, ...

SearchSecurity

  • Web application firewall (WAF)

    A web application firewall (WAF) is a firewall that monitors, filters and blocks data packets as they travel to and from a ...

  • spyware

    Spyware is a type of malicious software -- or malware -- that is installed on a computing device without the end user's knowledge.

  • application whitelisting

    Application whitelisting is the practice of specifying an index of approved software applications or executable files that are ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

SearchStorage

  • DRAM (dynamic random access memory)

    Dynamic random access memory (DRAM) is a type of semiconductor memory that is typically used for the data or program code needed ...

  • RAID 10 (RAID 1+0)

    RAID 10, also known as RAID 1+0, is a RAID configuration that combines disk mirroring and disk striping to protect data.

  • PCIe SSD (PCIe solid-state drive)

    A PCIe SSD (PCIe solid-state drive) is a high-speed expansion card that attaches a computer to its peripherals.

Close