Fractions, Decimals, Percentages Converter

Help me master conversions between fractions, decimals, and percentages:

Current Level: ${{LEVEL}}
Specific Challenges: ${{CHALLENGES}}
Areas to Focus: ${{FOCUS}}

Teach me:
1. Fraction to decimal conversion
2. Decimal to fraction conversion
3. Fraction to percentage conversion
4. Percentage to fraction conversion
5. Decimal to percentage conversion
6. Percentage to decimal conversion
7. Common equivalents to memorize
8. Mental math shortcuts
9. When to use each form
10. Real-world applications
11. Practice problems (graduated difficulty)
12. Word problems with conversions
13. Self-check methods
14. Common mistakes to avoid