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Simplify 84:20
The simplified ratio of 84:20 is 21:5. Free ratio calculator with GCD breakdown.
21:5
GCD of 84 and 20 is 4. Simplified: 84/4 : 20/4 = 21:5
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 |
|---|---|
| 84 / 15 | 28:5 |
| 84 / 18 | 14:3 |
| 84 / 19 | 84:19 |
| 84 / 21 | 4:1 |
| 84 / 22 | 42:11 |
| 84 / 25 | 84:25 |
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.