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Simplify 28:21
The simplified ratio of 28:21 is 4:3. Free ratio calculator with GCD breakdown.
4:3
GCD of 28 and 21 is 7. Simplified: 28/7 : 21/7 = 4:3
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 |
|---|---|
| 28 / 16 | 7:4 |
| 28 / 19 | 28:19 |
| 28 / 20 | 7:5 |
| 28 / 22 | 14:11 |
| 28 / 23 | 28:23 |
| 28 / 26 | 14:13 |
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.