Advice 1: How to translate percentage into number

Interest encountered at almost every step. Coupon promotion, the calculation of tax or other rates, different share and a fractional ratio. But the translation percentagea number is not so complicated.
How to translate percentage into number
Instruction
1
The percentage is by definition a hundredth part of the number. So 100% is actually a unit that is itself the original number. Interest, the value of which is less than 100, represent the percentage of the initial number of more than 100, the excess of the original number.
For convenience, use the percent recorded usually in the form of numbers from 1 to 100. Just often we are confronted with the values from this range. As with any number, of interest also are tenths, hundredths, and other shares.
Most often they occur when you work with Finance and other economic operations, as well as in the presentation of several variables constituting a part of the whole.
2
Now, we will directly transfer the percentage to a number. It is not difficult. As mentioned above, 1% is a hundredth of a share from the whole. There is a whole unit, therefore 1% = 0.01. Thus, to translate the percentage to a number, we need this amount of interest divided by 100, or in other words, move the decimal point in the number to the left, that is two orders of magnitude.
3
Functions for working with interest is also in almost any, even the simplest calculator but as you can see, this operation is very simple and requires no special effort or knowledge in mathematics. In fact, you need to remember only one formula. The resulting action will be a decimal fraction, and it, in turn, can be translated into common, presenting as significant digits of the decimal divided by 10 to the appropriate degree. Decimal fractions are generally very well perceived and written down by ear, most likely it was the reason of using 10 to the second power, i.e., 100, as the basic unit of percentage. Further it can be simplified by dividing the numerator and the denominator by their common factor. For example: 50% = 0,5 = 5/10 = 1/2.

Also true will reverse the action (try to convert this example from right to left).

Advice 2: How to translate decimal numbers in the fractional

Some non-integer number can be written in decimal form. In this case, the decimal point separating the integer part of the number, is a number of figures in the non-integer part of the number. In different cases, it is convenient to use either decimal numbersor fractional numbers. Decimal number can be converted into decimal.
How to translate decimal numbers in the fractional
You will need
  • the ability to reduce fractions
Instruction
1
If the denominator is 10, 100, or, in General, 10^n, where n is a natural number, then this fraction can be written as a decimal. The number of digits after the decimal point defines the denominator of such fraction. It is equal to 10^n, where n is the number of characters. So, for example, 0.3 mm can be written as 3/10, or 0.19 as 19/100, etc.
2
In some cases the resulting fraction can be reduced. For example, 0,5 = 5/10. Use the rules of reduction of fractions and divide the numerator and the denominator by the common factor of these numbers is 5. As a result, you will receive: 0,5 = 5/10 = 1/2.
3
Suppose now that the integer part of a decimal number not equal to zero. Then this number can be translated either into an improper fraction, where the numerator more than the denominator, or a mixed number. For example: 1,7 = 1+(7/10) = 17/10, 2,29 = 2+(29/100) = 229/100.
4
If at the end of a decimal fraction is one or more zeros, these zeros can be discarded, and transfer the number with the remaining number of decimal places in the fractional. Example: 1,7300 = 1,73 = 173/100.
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