How To Calculate Percentages Easily?
What is 18% of 100? How many times have you faced this situation in which you want to calculate percentages easily? Today we teach you through videoclases and exercises, to perform this mathematical operation in a fun and simple way.
Would you like to calculate percentages easily? If you are preparing some type of exam for college entrance, this is probably a topic that worries you as it almost always appears in the tests. As if all the pressure of having to learn the subject for the different annual evaluations was not enough, the content is indisputably used in our day to day. It is common to use this concept to calculate salary discounts, interest rates on bank transactions, the amount of a discount , among many other situations.
If we defined the meaning of the word, we would have a good idea of how to solve any mathematical problem in which the subject is involved. If we separate the first part of the word, we will have by cent (percent) a measure with base 100 , that is, it is the same as dividing a number by 100 .
Step by step exercise
Let's try to solve that question: write 18% as a decimal in the form of irreducible fraction (fraction that can not be simplified). If we know what percentage is the division of a number by 100 , we conclude that the fraction would be 18/100 . Dividing one number by the other will obtain the decimal order in the exercise, that is, 0.18 . Now to find the irreducible fraction of those numbers, we need to find a number divisible by the two. Are we going to try for 2? When we divide 18 by 2, the result is 9. By doing the same, dividing 100 by 2, we find 50 as a result. So, that: 9/50. That's the irreducible fraction, because there's no more number in common for 9 and 50.
Are we going to try another exercise? In the United States, 13 out of 20 cans are recycled . What is the percentage of recycled cans? If 20 corresponds to the total amount of cans, then we will divide 13/20 to find the percentage to which 13 corresponds. Making that division we will find 0.65 . To transform the value found in percentage, just multiply by 100. Then, 13 cans correspond to 65% of recycled cans.
Would you like to calculate percentages easily? If you are preparing some type of exam for college entrance, this is probably a topic that worries you as it almost always appears in the tests. As if all the pressure of having to learn the subject for the different annual evaluations was not enough, the content is indisputably used in our day to day. It is common to use this concept to calculate salary discounts, interest rates on bank transactions, the amount of a discount , among many other situations.
If we defined the meaning of the word, we would have a good idea of how to solve any mathematical problem in which the subject is involved. If we separate the first part of the word, we will have by cent (percent) a measure with base 100 , that is, it is the same as dividing a number by 100 .
What do you think of practicing with some exercises?
Step by step exercise
Let's try to solve that question: write 18% as a decimal in the form of irreducible fraction (fraction that can not be simplified). If we know what percentage is the division of a number by 100 , we conclude that the fraction would be 18/100 . Dividing one number by the other will obtain the decimal order in the exercise, that is, 0.18 . Now to find the irreducible fraction of those numbers, we need to find a number divisible by the two. Are we going to try for 2? When we divide 18 by 2, the result is 9. By doing the same, dividing 100 by 2, we find 50 as a result. So, that: 9/50. That's the irreducible fraction, because there's no more number in common for 9 and 50.
Are we going to try another exercise? In the United States, 13 out of 20 cans are recycled . What is the percentage of recycled cans? If 20 corresponds to the total amount of cans, then we will divide 13/20 to find the percentage to which 13 corresponds. Making that division we will find 0.65 . To transform the value found in percentage, just multiply by 100. Then, 13 cans correspond to 65% of recycled cans.
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