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Simplify 21/84
21/84 simplified is 1/4 = 0.2500. Free fraction calculator with GCD and decimal conversion.
1/4 = 0.2500
GCD of 21 and 84 is 21. Simplified: 21/21 / 84/21 = 1/4 = 0.2500
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 / 79 | 21/79 = 0.2658 |
| 21 / 82 | 21/82 = 0.2561 |
| 21 / 83 | 21/83 = 0.2530 |
| 21 / 85 | 21/85 = 0.2471 |
| 21 / 86 | 21/86 = 0.2442 |
| 21 / 89 | 21/89 = 0.2360 |
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.