You will need
  • a calculator or computer.
Instruction
1
To subtract from number percentage number is divided by 100, then the resulting quotient multiplied by the given number and subtract this product from a given number, use the following formula:
R = H – (P / 100 * H), where:

R – result, H – the initial number, N – number of percent.
2
In order to subtract a percentage using a calculator:
- type on the keyboard of the calculator to the original number;

- click on the minus ("-");

- enter the amount of interest;

- click on "%";

- click on the "=". If You did everything correctly, the display will show the number, reduced by a specified percentage.
3
To subtract from the number, the percentage using the computer, run the standard program Windows calculator (start –> Run –> calc –> OK). If the calculator is configured to "engineering" calculations, put it in the "simple" view (View –> Normal). The sequence of actions when using the computer calculator is the same as described in the previous paragraph.
4
If you subtract the percentage of the numbers you have to constantly, it is better to use MS Excel. To do this:
- start the Excel program;

- enter in the top-left cell (A1) the number 1000;

- enter in the top cell (B1) the number 13 (these numbers will need to control the correctness of your actions);

- move the cursor to the next cell (C1) and press the "="sign;

- specify cursor clicking the left mouse button) the cell A1;

- click "-";

again, specify cell A1;

- type "/100*";

- select cell B1 and press "Enter".
If everything was done correctly, then the cell C1 displays the number 870. Now, in order to subtract from the number a certain percentage, just type in cell A1 the number itself, and in cell B1 – number of percent. In cell C1 then the result will appear. If the result is not automatically recalculated (press F9.