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Simplify 420:85
The simplified ratio of 420:85 is 84:17. Free ratio calculator with GCD breakdown.
84:17
GCD of 420 and 85 is 5. Simplified: 420/5 : 85/5 = 84:17
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 |
|---|---|
| 420 / 80 | 21:4 |
| 420 / 83 | 420:83 |
| 420 / 84 | 5:1 |
| 420 / 86 | 210:43 |
| 420 / 87 | 140:29 |
| 420 / 90 | 14:3 |
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.