Key Concepts
- To determine what percentage one number is of another, divide the part by the whole and multiply by 100.
- Example: If 20 out of 50 students are girls, the percentage of girls is ((20/50) \times 100 = 40%).
Skills Covered
- Solve problems asking "What percentage of X is Y?"
- Express part-to-whole relationships in percentage form.
Example Problems
- What percentage of 80 is 32?
- 45 out of 150 students passed the exam. What percentage passed?
- If 12 out of 60 apples are rotten, what percentage is rotten?