In technical and economic calculations sometimes it is required to subtract percent from number. So for example, characteristics of many radio components are set in a look: face value +-percent from face value. At issue of the salary to the worker from it it is necessary to hold 13% of income tax. It is the simplest to subtract percent from number on the "accounting" calculator – for this purpose it is not even necessary to make any intermediate calculations.
It is required to you
- calculator or computer.
Instruction
1. To subtract percent from number, it is necessary to divide number into 100, then received private to increase by this number and to subtract this work from this number, that is, to use the following formula: Р = H – (P / 100 * H), where: Р – result, H – initial number, P – the number of percent.
2. To subtract percent by means of the calculator: - type initial number on the calculator keyboard; - press the minus button ("-"); - gain the number of percent; - press the % button; - press the = button. If all of you made correctly, on the indicator there will be a number reduced by the set number of percent.
3. To subtract from number percent by means of the computer, start on it the standard program "Windows calculator" (Start-up –> to Execute –> calc –> Ok). If the calculator is tuned into "engineering" calculations, transfer it to a "simple" look (the Look –> Usual). The sequence of actions when using the computer calculator same as it is described in the previous point.
4. If it is necessary to subtract percent from numbers constantly, then it is better to use the Excel MS program. For this purpose: - start the Excel program; - enter number 1000 into the top left cage (A1); - enter number 13 into the second top cage (B1), (these numbers will be necessary for control of correctness of your actions); - move the cursor to the following cage (C1) and press the sign "="; - specify by the cursor (having clicked the left key of a mouse) A1 cage; - press "-"; - again specify A1 cage; - gather "/100 *"; - specify a cage of B1 and press "Enter". If everything was made correctly, then in a cage of C1 number 870 will appear. Now, to subtract a certain percent from number, just enter into A1 cage number, and into B1 cage – the number of percent. In C1 cage the result immediately will appear. If the result automatically is not recalculated – press F9 key.