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Simplify 21/40
21/40 simplified is 21/40 = 0.5250. Free fraction calculator with GCD and decimal conversion.
21/40 = 0.5250
GCD of 21 and 40 is 1. Simplified: 21/1 / 40/1 = 21/40 = 0.5250
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 / 35 | 3/5 = 0.6000 |
| 21 / 38 | 21/38 = 0.5526 |
| 21 / 39 | 7/13 = 0.5385 |
| 21 / 41 | 21/41 = 0.5122 |
| 21 / 42 | 1/2 = 0.5000 |
| 21 / 45 | 7/15 = 0.4667 |
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.