GeneralClass 8CBSE
Q
What does 12 1/2 equal to?
A
12 1/2 (twelve and one-half) equals 12.5 in decimal form, or 25/2 as an improper fraction.
Detailed Explanation:
Different Representations:
As a Mixed Number: 12 1/2
- 12 whole units
- Plus 1/2 of another unit
As a Decimal: 12.5
- 12 + 0.5 = 12.5
As an Improper Fraction: 25/2
- Conversion: (12 × 2) + 1 = 24 + 1 = 25
- Denominator stays 2
- Result: 25/2
As a Percentage of Something:
- If asked "12 1/2% of 100," that would be 12.5% = 0.125 × 100 = 12.5
Conversion Methods:
Mixed to Decimal:
- 12 1/2 = 12 + (1 ÷ 2)
- = 12 + 0.5 = 12.5
Mixed to Improper:
- Multiply whole number by denominator: 12 × 2 = 24
- Add numerator: 24 + 1 = 25
- Keep denominator: 25/2
Real-World Uses:
- 12 1/2 inches = 12.5 inches
- 12 1/2 hours = 12 hours 30 minutes
- $12.50 (twelve dollars fifty cents)
Important Notes:
- 12 1/2 = 12.5 (decimal)
- 12 1/2 = 25/2 (improper fraction)
- All three forms represent the same value