Each of us in life has come across percentages. What takes place as part of a school algebra course can cause problems even in adults. This is not a big deal, because in today's article we’ll just talk about how to simply multiply a number by a percentage and get the desired result.
General concept
Percentage means a fixed fraction of any number, namely the hundredth. On the letter, it is indicated by the% sign.
For instance:
- One percent is equal to 1/100 share.
- Five percent make up 5/100 of the number.
- One hundred percent are 100/100 shares of the number. According to the rules of reduction, this simple fraction results in a unit. Thus, 100 percent is equal to this very number.
In life you can often hear the promise to do everything possible. In other words, give it all 100 percent. In fact, this means the following. They will have to use their maximum strength, that is, 100 out of 100 shares of their vital energy reserves.
Interest is used everywhere. Possession of the technique of their calculation will allow you to feel confident in any situation associated with the need to find them.
How to multiply percent by number?
When you multiply percent by number, one very simple rule applies. Let's consider in more detail.
In order to perform this action, you must first multiply the number by the number of percentages, and then divide the final result by 100. Consider the following examples:
- You need 200 times 5%. To do this, first we multiply 200 by the number of percent - 5, as if they were prime numbers. As a result, we get 1,000. But the calculations do not end there. It is necessary to divide the result of multiplication by 100. Thus, we get: 1000/100 = 10. The result is less than our original number. Is there a mistake in this? No, if you recall the definition of percentage. So, 5% are only 5 shares out of 100, or 5/100. This is a very small value, and when multiplied by any number, it gives a result much less than the original value.
- Multiply the same number - 200 by 105%. To do this, you must follow the same algorithm. We multiply 200 by 105 and get 21,000. Divide by 100 and get 210. As can be seen from the example, 105% are 105 parts out of 100. This value is more than one, and therefore, when multiplied, we get a value that is larger than the original.
How to multiply interest by interest?
To multiply interest by interest, you must follow the same rules. For example, according to the conditions of the problem, it is necessary to multiply 50% by 30%. Perform actions: 50 * 30 = 1,500. Divide the result by 100 and get 15%. In this way, other similar problems related to multiplying percentages by one another can be solved.