Bring back a score out of 20: Have you ever wondered how grades obtained in school are converted into a system out of 20? Don't worry, we have the answer! In this article, we will explain in detail how the conversion of scores out of 20 works and give you all the tips to fully understand this system. Whether you are a student or a parent, this information will be valuable to you in better understanding academic results. So, fasten your seat belts and get ready to discover the mystery behind the scores out of 20!
Understanding the conversion of marks to system out of 20
The rating system out of 20 is a standard widely used in the educational world, particularly in French-speaking countries. It makes it possible to evaluate the academic performance of students in a uniform manner. However, it is often the case that assessments are scored on other bases, such as 10, 15, 30, or even 100. Know bring back a score out of 20 is therefore an essential skill for students and educators.
The basic rule for converting a note
To convert a note obtained on any scale towards a score out of 20, the method is simple and mathematical. This involves finding a coefficient of proportionality which will allow the initial score to be adjusted to the desired scale.
If we take the example of a score obtained from 13 out of 15, here is the conversion process:
- Percentage calculation: 13/15 = 0,87.
- Conversion to score out of 20: 0,87 x 20 = 17,3.
The score out of 20 would therefore be 17,3. This calculation ensures a fair transposition of the student's performance, regardless of the initial scale.
Adapt grades with different scales
The situation becomes complicated when the marks to be converted come from different scales. Let's take the example of a score out of 30. Here, we divide the score by 1,5 for the reduce to 20. For scores out of 10, simply multiply them by 2 before calculating the average with the other scores already out of 20.
Example: A score of 24 out of 30 becomes 24/1,5 = 16 out of 20. A score of 8 out of 10 becomes 8 x 2 = 16 out of 20. The simple average between these two converted scores will give the general average out of 20.
Calculating the average of marks on different scales
The grade average is a key indicator in academic monitoring. To obtain a fair and representative average of a student's performance, it is crucial to know how to integrate marks from different scales.
The method for calculating a mixed average
When it's about calculate an average between scores out of 10 and others out of 20, the principle is to bring all the scores to a common scale before proceeding with the calculation. Here's how to do it:
- Multiplication of notes out of 10 by 2.
- Calculation of the simple average of the scores now all out of 20.
This process allows all grades to be treated equally, regardless of the original scale.
Moving from a scale rating to a percentage rating
It is also common to have to convert grade to percentage, especially when it comes to obtaining an overall vision of success in relation to a possible total points, as is often the case for competitive exams or standardized tests.
Conversion to a score out of 100
The score out of 100, or percentage, provides an immediate reading of performance. To achieve this, the method is direct:
- Division of the total points obtained by the total possible.
- Multiply the result by 100 to get the percentage.
This form of grading is particularly relevant in contexts where we wish to measure mastery of a subject absolutely.
Example: If a student obtains 75 points out of a possible total of 100, their percentage mark is 75/100 = 0,75, or 75%.
Deepening conversion techniques
Conversion of notes is a practice that requires rigor and precision. In some cases, rounding may be applied to simplify the results, but they must be used with caution so as not to distort the overall assessment.
Rounding and their impact
When we convert a note, the figures obtained can be long and difficult to interpret. Rounding helps simplify these numbers. However, it is important to follow the academic rules in force to ensure that these roundings do not substantially modify the final grade.
As a general rule, we round to the nearest decimal place, following the principle of standard mathematical rounding: above 5, we go up; below, we go down.
Conclusion
The ability to bring back a score out of 20 or converting it to a percentage is a valuable tool in the field of education. Whether for students seeking to understand their level of achievement, or for teachers who wish to provide fair and understandable assessments, mastering these conversion techniques is essential. With the methods outlined above, students and educators can approach grading systems with confidence and precision.
FAQ & Questions about Bringing Back a Score Out of 20?
Q: How do I get a score out of 20?
A: To bring a score out of 20, you must multiply the score obtained by 20 and divide the result by the possible total. For example, if we have 13 out of 15, we do 13/15 = 0,87 (percentage), then 0,87 x 20 = 17,3, so the score out of 20 would be 17,3.
Q: How do I calculate the average between scores out of 10 and others out of 20?
A: To calculate the average between scores out of 10 and others out of 20, you must multiply the scores out of 10 by 2 to bring them back to 20, then take the simple average.
Q: How to increase your average in 1 week?
A: To improve your average in 1 week, it is recommended to attend classes attentively and participate actively. Listening carefully to the teacher's explanations, taking clear notes and asking questions when you don't understand something are basic actions to improve your academic results.
Q: How do I calculate my score out of 100?
A: To calculate your score out of 100, divide your total points by the total points you can obtain. In other words, divide the number at the bottom of the first column by the number at the bottom of the second. Then, multiply the resulting decimal number by 100.