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how to work out percentage decrease formula in excel

how to work out percentage decrease formula in excel

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Calculate percentages

Sometimes percentages can be frustrating because it’s not always easy to remember what we learned about them in school. Let Excel do the work for you – simple formulas can help you find the percentage of a total, for example, or the percentage difference between two numbers.
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Find the percentage of a total

Let’s say that you answered 42 questions out of 50 correctly on a test. What is the percentage of correct answers?

1. Click any blank cell.
2. Type =42/50, and then press RETURN .The result is 0.84.
3. Select the cell that contains the result from step 2.
4. On the Home tab, click  .The result is 84.00%, which is the percentage of correct answers on the test.

Note: To change the number of decimal places that appear in the result, click Increase Decimal  or Decrease Decimal  .

Find the percentage of change between two numbers

Let’s say that your earnings are \$2,342 in November and \$2,500 in December. What is the percentage of change in your earnings between these two months? Then, if your earnings are \$2,425 in January, what is the percentage of change in your earnings between December and January? You can calculate the difference by subtracting your new earnings from your original earnings, and then dividing the result by your original earnings.

Calculate a percentage of increase

1. Click any blank cell.
2. Type =(2500-2342)/2342, and then press RETURN .The result is 0.06746.
3. Select the cell that contains the result from step 2.
4. On the Home tab, click  .The result is 6.75%, which is the percentage of increase in earnings.

Note: To change the number of decimal places that appear in the result, click Increase Decimal  or Decrease Decimal  .

Calculate a percentage of decrease

1. Click any blank cell.
2. Type =(2425-2500)/2500, and then press RETURN .The result is -0.03000.
3. Select the cell that contains the result from step 2.
4. On the Home tab, click  .The result is -3.00%, which is the percentage of decrease in earnings.

Note: To change the number of decimal places that appear in the result, click Increase Decimal  or Decrease Decimal  .

Find the total when you know the amount and percentage

Let’s say that the sale price of a shirt is \$15, which is 25% off the original price. What is the original price? In this example, you want to find 75% of which number equals 15.

1. Click any blank cell.
2. Type =15/0.75, and then press RETURN .The result is 20.
3. Select the cell that contains the result from step 2.
4. In newer versions:On the Home tab, click .The result is \$20.00, which is the original price of the shirt.In Excel for Mac 2011:On the Home tab, under Number, click Currency

The result is \$20.00, which is the original price of the shirt.

Note: To change the number of decimal places that appear in the result, click Increase Decimal  or Decrease Decimal  .

Find an amount when you know the total and percentage

Let’s say that want to purchase a computer for \$800 and must pay an additional 8.9% in sales tax. How much do you have to pay for the sales tax? In this example, you want to find 8.9% of 800.

1. Click any blank cell.
2. Type =800*0.089, and then press RETURN.The result is 71.2.
3. Select the cell that contains the result from step 2.
4. In newer versions:On the Home tab, click .In Excel for Mac 2011:On the Home tab, under Number, click CurrencyThe result is \$71.20, which is the sales tax amount for the computer.

Note: To change the number of decimal places that appear in the result, click Increase Decimal  or Decrease Decimal  .

Increase or decrease a number by a percentage

Let’s say that you spend an average of \$113 on food each week, and you want to increase your weekly food expenditures by 25%. How much can you spend? Or, if you want to decrease your weekly food allowance of \$113 by 25%, what is your new weekly allowance?

Increase a number by a percentage

1. Click any blank cell.
2. Type =113*(1+0.25), and then press RETURN .The result is 141.25.
3. Select the cell that contains the result from step 2.
4. In newer versions:On the Home tab, click .In Excel for Mac 2011:On the Home tab, under Number, click CurrencyThe result is \$141.25, which is a 25% increase in weekly food expenditures.

Note: To change the number of decimal places that appear in the result, click Increase Decimal or Decrease Decimal  .

Decrease a number by a percentage

1. Click any blank cell.
2. Type =113*(1-0.25), and then press RETURN .The result is 84.75.
3. Select the cell that contains the result from step 2.
4. In newer versions:On the Home tab, click .In Excel for Mac 2011:On the Home tab, under Number, click Currency

The result is \$84.75, which is a 25% reduction in weekly food expenditures.

Input

Electronic calculators contain a keyboard with buttons for digits and arithmetical operations; some even contain “00” and “000” buttons to make larger or smaller numbers easier to enter. Most basic calculators assign only one digit or operation on each button; however, in more specific calculators, a button can perform multi-function working with key combinations.

Display output

Calculators usually have liquid-crystal displays (LCD) as output in place of historical light-emitting diode (LED) displays and vacuum fluorescent displays (VFD); details are provided in the section Technical improvements.

Large-sized figures are often used to improve readability; while using decimal separator (usually a point rather than a comma) instead of or in addition to vulgar fractions. Various symbols for function commands may also be shown on the display. Fractions such as 13 are displayed as decimal approximations, for example rounded to 0.33333333. Also, some fractions (such as 17, which is 0.14285714285714; to 14 significant figures) can be difficult to recognize in decimal form; as a result, many scientific calculators are able to work in vulgar fractions or mixed numbers.

Memory

Calculators also have the ability to store numbers into computer memory. Basic calculators usually store only one number at a time; more specific types are able to store many numbers represented in variables. The variables can also be used for constructing formulas. Some models have the ability to extend memory capacity to store more numbers; the extended memory address is termed an array index.

Power source

Power sources of calculators are batteries, solar cells or mains electricity (for old models), turning on with a switch or button. Some models even have no turn-off button but they provide some way to put off (for example, leaving no operation for a moment, covering solar cell exposure, or closing their lid). Crank-powered calculators were also common in the early computer era.

Key layout

The following keys are common to most pocket calculators. While the arrangement of the digits is standard, the positions of other keys vary from model to model; the illustration is an example.

Internal workings

• Power source (mains electricity, battery and/or solar cell)
• Keypad (input device) – consists of keys used to input numbers and function commands (addition, multiplication, square-root, etc.)
• Display panel (output device) – displays input numbers, commands and results. Liquid-crystal displays (LCDs), vacuum fluorescent displays (VFDs), and light-emitting diode (LED) displays use seven segments to represent each digit in a basic calculator. Advanced calculators may use dot matrix displays.
• A printing calculator, in addition to a display panel, has a printing unit that prints results in ink onto a roll of paper, using a printing mechanism.
• Processor chip (microprocessor or central processing unit).

resource: wikipedia