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Simplify 42/20
42/20 simplified is 21/10 = 2.1000. Free fraction calculator with GCD and decimal conversion.
21/10 = 2.1000
GCD of 42 and 20 is 2. Simplified: 42/2 / 20/2 = 21/10 = 2.1000
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 |
|---|---|
| 42 / 15 | 14/5 = 2.8000 |
| 42 / 18 | 7/3 = 2.3333 |
| 42 / 19 | 42/19 = 2.2105 |
| 42 / 21 | 2/1 = 2.0000 |
| 42 / 22 | 21/11 = 1.9091 |
| 42 / 25 | 42/25 = 1.6800 |
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.