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Simplify 42:80
The simplified ratio of 42:80 is 21:40. Free ratio calculator with GCD breakdown.
21:40
GCD of 42 and 80 is 2. Simplified: 42/2 : 80/2 = 21:40
How This Was Calculated
Simplification: Divide both terms by their GCD.A:B = (A/GCD) : (B/GCD)
Solving proportions: A/B = C/D — cross-multiply to find the missing value.
Scaling: Multiply both terms by the scale factor.
Quick Reference Table
| Input | Result |
|---|---|
| 42 / 75 | 14:25 |
| 42 / 78 | 7:13 |
| 42 / 79 | 42:79 |
| 42 / 81 | 14:27 |
| 42 / 82 | 21:41 |
| 42 / 85 | 42:85 |
Frequently Asked Questions
What is a ratio?
A ratio compares two quantities by division.
How do I simplify a ratio?
Divide both numbers by their greatest common divisor (GCD).
Can ratios have decimal values?
Yes, but simplified ratios are typically expressed as whole numbers.