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Simplify 105:21
The simplified ratio of 105:21 is 5:1. Free ratio calculator with GCD breakdown.
5:1
GCD of 105 and 21 is 21. Simplified: 105/21 : 21/21 = 5:1
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 |
|---|---|
| 105 / 16 | 105:16 |
| 105 / 19 | 105:19 |
| 105 / 20 | 21:4 |
| 105 / 22 | 105:22 |
| 105 / 23 | 105:23 |
| 105 / 26 | 105:26 |
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.