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Add 3 Percent to a Number OR
Use this calculator to quickly add 3 percent to a number. With this free calculator, you can calculate the new number by inputing the percentage and the original number for an addition of 3 percent, or by using the buttons to decrease a number by 3 percent or to increase a number by 3 percent.
The first step in increasing a number by a percentage is to convert the percent to a decimal. The easiest way to do this is move the decimal point two points to the left. For example, 30 percent as a decimal is 0.3, and 50 percent as a decimal is 0.5. If you have a calculator with a percent key (%), enter your number and press % to convert the percent to a decimal (you may have to press the = key on some models). Another way to work out the decimal is to remember that 100 percent is 1, because it is the whole of something. This means 50 percent is one-half (0.5), 25 percent is one-quarter (0.25), 75 percent is three-quarters (0.75) and so on.
Formatting cells that already contain numbers If you apply the Percentage format to existing numbers in a workbook, Excel multiplies those numbers by 100 to convert them to percentages. For example, if a cell contains the number 10, Excel multiplies that number by 100, which means that you will see 1000.00% after you apply the Percentage format. This may not be what you expected. To accurately display percentages, before you format the numbers as a percentage, make sure that they have been calculated as percentages, and that they are displayed in decimal format. Percentages are calculated by using the equation amount / total = percentage. For example, if a cell contains the formula =10/100, the result of that calculation is 0.1. If you then format 0.1 as a percentage, the number will be correctly displayed as 10%. To learn more about calculating percentages, see Examples of calculating percentages. (Source:support.microsoft.com)
In some math problems, you might know the percent increase or decrease and the new amount, and need to work out the original amount. For example, you know a bed with a $280 sale price has been reduced by 30 percent. To work out the original price of the bed, you have to establish what percentage of the original price the sale price is. The original price is 100 percent and 30 percent has been taken off, so the sale price is 70 percent of the original price. Divide the sale price (280) by the numerical value of 70 percent, or 0.7, to work out the original price. The answer is 400, so you know the original price of the bed was $400.
Calculating percentages is an easy mathematical process to carry out. Sometimes, when there is the need to find the ratio or portion of a quantity as a part of another quantity, you will need to express it as a percentage. In this article, we show you what percentages are, how to calculate them and everyday examples of their use. (Source: www.indeed.com)