If you’re responsible for reports of any kind within your organisation, the chances are you more than likely look at Percentage increase and percentage decrease of performance quite regularly. But how do you remember how to calculate them? Believe it or not, it’s quite a common question. In fact it’s asked on Google over 24,000 times a month. So we’ve put this guide together on how to calculate percentages so you can solve those equations in no time.

Below I cover the following:

• How To Calculate Percentage Increase
• How To Calculate Percentage Decrease
• How To Convert Decimals To Percentages
• How To Convert Fractions To Percentages
• How To Calculate The Percentage Of Two Numbers

How To Calculate Percentage Increase

1. In order to calculate percentage increase, you first need to work out the increased difference between the two numbers
   (Number 2 – Number 1 = Increased Difference)
   Example: 1,700 – 1,000 = 700
2. Then divide the increase by the original number and multiply the answer by 100.
   (Increased Difference / Number 1 x 100 = Percentage Increase)
   Example: (700 / 1000) x 100 = 70
3. Therefore the percentage increase was 70%

How To Calculate Percentage Decrease

1. In order to calculate percentage decreaase, you first need to work out the decreased difference between the two numbers
   (Number 1 – Number 2 = Decreased Difference)
   Example: 2,000 – 1,600 = 400
2. Then divide the decrease by the original number and multiply the answer by 100.
   (Decreased Difference / Number 1 x 100 = Percentage Decrease)
   Example: (400/2,000) x 100 = 20
3. Therefore the percentage decrease was 20%

How To Convert Decimals To Percentages

1. In order to convert a decimal to a percentage, you simply multiply your decimal number by 100
   Example: 0.25 x 100 = 25
2. The answer is now your percentage, i.e. 25%
3. If the decimal was longer than two digits, i.e. 0.2518, then the answer would be 25.18%

How To Convert Fractions To Percentages

1. In order to convert the fraction to a percentage, you first need to divide the top of the fraction by the bottom
   Example: 6 / 8 = 0.75
2. Then multiply your answer by 100. This is now converted to a percentage.
   Example: 0.75 x 100 = 75%

How To Calculate The Percentage Of Two Numbers

1. In order to find out what percentage Number 1 is of Number 2, we first divide Number 1, by Number 2.
   Example: 35 / 75 = 0.46
2. Then multiply the answer by 100 to get the percentage.
   Example: 0.46 x 100 = 46%

That’s it. Hopefully you now know how to calculate percentages and understand how easy it is.

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