How to calculate percentage increase or decrease

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how to calculate percentage increase or decrease

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How to calculate percentage increase or decrease

Cevap:
Calculating percentage increase or decrease is a useful skill for various purposes like analyzing data, comparing numbers, or tracking changes over time. The formula for calculating percentage increase or decrease is as follows:

Percentage increase = ((new value - old value) / old value) * 100
Percentage decrease = ((old value - new value) / old value) * 100

Here’s a step-by-step guide on how to calculate percentage increase or decrease:

  1. Identify the old value: This is the initial value or the value before the change.

  2. Identify the new value: This is the updated value or the value after the change.

  3. Determine whether it is an increase or decrease: If the new value is greater than the old value, it’s an increase. If the new value is less than the old value, it’s a decrease.

  4. Calculate the difference between the new value and the old value: Subtract the old value from the new value. This will give you the numerical difference between the two values.

  5. Divide the difference by the old value: Divide the difference obtained in step 4 by the old value.

  6. Multiply by 100: Take the result from step 5 and multiply it by 100 to get the percentage increase or decrease.

For example, let’s say you want to calculate the percentage increase in the price of a product. If the old price was $50 and the new price is $60, you would follow these steps:

Step 1: Old value = $50
Step 2: New value = $60
Step 3: Increase (new value > old value)
Step 4: Difference = $60 - $50 = $10
Step 5: Percentage increase = ($10 / $50) * 100 = 20%

Therefore, the price of the product has increased by 20%.

Similarly, if the new price was $40, you would follow these steps:

Step 1: Old value = $50
Step 2: New value = $40
Step 3: Decrease (new value < old value)
Step 4: Difference = $50 - $40 = $10
Step 5: Percentage decrease = ($10 / $50) * 100 = 20%

In this case, the price of the product has decreased by 20%.

By following these steps and using the formula, you can easily calculate the percentage increase or decrease in any given situation.