Instruction

1

Specify the task in accordance with the logic if you do not specify the exact wording. For example, if a test result (80 correct answers and 20 incorrect), then 100 percent should be taken the amount of known quantities (80+20=100). Based on this, you can determine the percentage ratio of two quantities as 80% to 20%. And if the conditions of the problem know the number of correct answers (80) and the number of questions (100), 100 percent should take one of the known quantities, rather than their sum. Determining what value should be considered an absolute benchmark, you can go to practical result.

2

Find the ratio of two quantities, dividing one on another, and then multiply the result by 100 to Express this ratio in percents. If we make such calculations in mind, it is not possible, use, for example, a calculator built into the Google search engine. To do this, go to the home page of this web resource and enter the appropriate request. For example, if it is necessary to calculate the percentage of correct answers (37) of the total number (52), then type "37 / 52 * 100" and you will see the correct answer (71.1538462).

3

Use, for example, the spreadsheet editor of Microsoft Excel, if you want to do without the Internet. Run it, enter is used to calculate the data. For example, in the first cell, enter the number of correct answers (37) and the second the total number of responses (52). In the third cell, press the equal sign, then click the first cell, press the slash (the slash), click the second cell and press Enter. The editor will calculate a simple ratio of the two quantities. To put it in percentages, set the cell format to percent. To do this, right-click the mouse and select the context menu "Format. In the list of "number formats", click the string "Interest" and the "Number of decimal places, specify which sign is necessary to round the result. Then click "OK".

# Advice 2 : How to calculate percentage

One-hundredth of a whole is called the percentage. If this integer value is composed of several separate parts, each of them can be measured in hundredths of the whole.

**The ratio**of the magnitudes of these components will be called a percentage. Practical calculation it is not difficult and consists of several simple mathematical operations.Instruction

1

Find out what the values should be based on the expectation value of one percent. For example, if a drug consists of two ingredients, three-dimensional characteristics are known, then the whole should be the sum of these two known values and calculate the value of one percent, dividing that amount into one hundred parts. For example, if ready to eat the paint contains eight hundred milliliters of the actual paint and four hundred milliliters of solvent, then the one percent will be expressed the value of twelve ounces, as (800+400)/100=12.

2

Find the percentage expression of each of compared values, dividing the value of each of the components of the integer values calculated in the previous step size one percent. For example, the amount of dye in solution from the example in the previous step will be about 67 percent, as 800/12=66,6666667. And the volume of solvent of the same example is equal to approximately 33 percent, so 400/12=33,3333333. These two numbers will Express the percentage of the components of ready solution components.

3

Use for calculations, for example, built into the Windows operating system software calculator, if you calculate values in mind is not possible. To access this application through a standard dialog box run programs by calling it by pressing shortcut keys win + r.

4

In dialogue it is necessary to type the command calc and click on the "OK" button. The calculator interface is extremely simple, and the sequence of several operations of division and multiplication, as described in the previous steps, is unlikely to cause any difficulties.