how do you work out percentages with a calculator?
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If your calculator has a percentage button, the calculation is as follows: 40 x 25% = 10. If your calculator does not have a percentage button, you must first divide the percentage by 100: 25 ÷ 100 = 0.25. You can then multiply this answer by the whole to determine the part: 0.25 x 40 = 10.
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First you need to calculate what number the percentage is equal to. Do this by converting the percentage to a decimal and then multiplying the decimal by the original number. Now you can add this answer to the original number.
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Decimal to Percent (%) Calculator To write a number as a percetage, just multiply the decimal value by 100. In this case we have: 1.6 × 100 = 160% (answer).
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Calculating the percent difference requires you to take the difference of values, divide it by the average of the two values and then multiply that number times 100. Subtract the two numbers from each other and place the value of the difference in the position of the numerator.
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['Convert the problem to an equation using the percentage formula: Y/P% = X.', 'Y is 25, P% is 20, so the equation is 25/20% = X.', 'Convert the percentage to a decimal by dividing by 100.', 'Converting 20% to a decimal: 20/100 = 0.20.']
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['Convert the fraction part of the mixed number to a decimal: Divide the numerator by the denominator.', 'Add the decimal to the whole number part of the mixed number.', 'Convert the decimal to a percent: Multiply the decimal number by 100.']
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['Written using the formula: X = 7 ÷ 20%', 'Convert the percent to a decimal.', '20% ÷ 100 = 0.2.', 'X = 7 ÷ 0.2.', 'X = 35.', 'So 20% of 35 is 7.']
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To calculate 25 percent of a number, simply divide it by 4. For example, 25 percent of 12 is 12 divided by 4, or 3. 10 percent means one tenth. To calculate 10 percent of a number, simply divide it by 10 or move the decimal point one place to the left.
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['5 ÷ 100 =', '0.05 =', '0.05 × 100/100 =', '0.05 × 100% =']
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another number is easy. If you want to know what percent A is of B, you simple divide A by B, then take that number and move the decimal place two spaces to the right. That's your percentage!
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['Converting from a decimal to a percentage is done by multiplying the decimal value by 100 and adding %.', 'Example: 0.10 becomes 0.10 x 100 = 10%', 'Example: 0.675 becomes 0.675 x 100 = 67.5%']
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['Example:', 'A. Divide the mark given for each small assignment by the possible mark for each small assignment.', 'B. Add the marks given for each assignment. Then add the possible marks given for each assignment. Divide the given mark by the possible mark. ... ', 'C. Multiply the decimal by 100 to calculate the percentage.']
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Press the equal sign to get an answer of 100. Divide this percentage by the number you need to divide by. For example, to divide the resultant percentage by 5, you would key in 100, followed by /, 5, and then =. This would give you an answer of 20.
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Percentage Calculator How to find 80% of a number? Take the number and multiple it by 80. Then multiply that by . 01.
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To calculate percentages, start by writing the number you want to turn into a percentage over the total value so you end up with a fraction. Then, turn the fraction into a decimal by dividing the top number by the bottom number. Finally, multiply the decimal by 100 to find the percentage.
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You divide your percentage by 100. So, 40% would be 40 divided by 100 or . 40. Once you have the decimal version of your percentage, simply multiply it by the given number.
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About This Article To calculate percentages, start by writing the number you want to turn into a percentage over the total value so you end up with a fraction. Then, turn the fraction into a decimal by dividing the top number by the bottom number. Finally, multiply the decimal by 100 to find the percentage.