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Simplify 15:18
The simplified ratio of 15:18 is 5:6. Free ratio calculator with GCD breakdown.
5:6
GCD of 15 and 18 is 3. Simplified: 15/3 : 18/3 = 5:6
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 |
|---|---|
| 15 / 13 | 15:13 |
| 15 / 16 | 15:16 |
| 15 / 17 | 15:17 |
| 15 / 19 | 15:19 |
| 15 / 20 | 3:4 |
| 15 / 23 | 15:23 |
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.