In this lesson, you will learn about "ratios and percentages," one of the most important topics concerning quantities and change. The goal is not simply to memorize words, but to be able to explain the principles and reasons in your own words.
Key Point
A ratio is found by dividing the compared quantity by the reference quantity, and a percentage is expressed by multiplying it by 100.
A ratio is found by dividing the compared quantity by the reference quantity, and a percentage is expressed by multiplying it by 100.
Important Points
- Check not only the conclusion but also the reason for it
- Distinguish similar terms and exceptions
- Try applying the same way of thinking to other examples
Practice
- Explain the key point in two sentences.
- Give one common misunderstanding and explain what is different about it.
- Check it by applying it to a familiar or specific example.