The RD Sharma Solutions for Class 7 Maths Chapter 11 percentage deals with educating students on calculating the percentage for any given data. It also helps students understand the meaning of percentage. The percentage is nothing but a number or a ratio expressed in a fraction of 100. If one needs to calculate the percentage of a number, divide it by whole and multiply it by 100. Thus, the percentage indicates a part per hundred. And more importantly, the word percent means per 100. The symbol "% denotes it".
Here are a few examples of percentages: 10% = 1 /10 fraction, 50% = 1 / 2 fraction, 90% = 9 / 10 fraction. Percentages are dimensionless numbers because they do not contain any units. Similarly, percentages can also be represented in fraction or decimal form like 0.7%, 0.58%, etc. The percentage is also used to describe someone's academic performance, like 80% of marks out of 100. The Class 7 Maths Chapter 11 percentage gives a detailed view of all the other important concepts in percentage. One such topic is deriving the actual formula,
Percentage formula = (value / total value) * 100
After discussing all this, the next step is to find the percentage of any given number using the formula mentioned above. To give you an example, (7 / 10) * 100 = 70% In addition to all this, students also gain a piece of deep knowledge on various other topics, namely, conversion of a percentage into a fraction, conversion of fraction into a percentage, conversion of ratio into percent, conversion of percent into ratio, conversion of a percent into decimal & vice versa.
These are all the important concepts that are covered under this topic. Additionally, students are given some exercise problems, including word problems, to get familiarised with this topic.