Ratio and Proportion Problem Solver

Help me with ratio and proportion problems:

Problem: ${{PROBLEM}}
Type: ${{TYPE}} (ratio, proportion, rate, scale)
Level: ${{LEVEL}}
Confusion: ${{CONFUSION}}

Cover:
1. Ratio concept and notation
2. Simplifying ratios
3. Proportion definition
4. Cross multiplication
5. Solving proportions
6. Unit rates
7. Scale factors
8. Similar figures
9. Real-world applications
10. Word problem strategies
11. Practice problems
12. Common mistakes
13. Mental math shortcuts