🔢
Simplify 21/2
21/2 simplified is 21/2 = 10.5000. Free fraction calculator with GCD and decimal conversion.
21/2 = 10.5000
GCD of 21 and 2 is 1. Simplified: 21/1 / 2/1 = 21/2 = 10.5000
How This Was Calculated
Simplification: Divide numerator and denominator by their GCD.
Addition: a/b + c/d = (ad + bc) / bd
Subtraction: a/b - c/d = (ad - bc) / bd
Multiplication: a/b × c/d = ac / bd
Division: a/b ÷ c/d = ad / bc
Quick Reference Table
| Input | Result |
|---|---|
| 21 / 1 | 21/1 = 21.0000 |
| 21 / 3 | 7/1 = 7.0000 |
| 21 / 4 | 21/4 = 5.2500 |
| 21 / 7 | 3/1 = 3.0000 |
Frequently Asked Questions
What is a fraction?
A fraction represents a part of a whole, written as numerator/denominator.
How do I simplify fractions?
Divide both numerator and denominator by their greatest common divisor.
Can I add fractions with different denominators?
Yes, the calculator handles common denominators automatically.