⚡
Simplify 20:42
The simplified ratio of 20:42 is 10:21. Free ratio calculator with GCD breakdown.
10:21
GCD of 20 and 42 is 2. Simplified: 20/2 : 42/2 = 10:21
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 |
|---|---|
| 20 / 37 | 20:37 |
| 20 / 40 | 1:2 |
| 20 / 41 | 20:41 |
| 20 / 43 | 20:43 |
| 20 / 44 | 5:11 |
| 20 / 47 | 20:47 |
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.