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Simplify 420:40
The simplified ratio of 420:40 is 21:2. Free ratio calculator with GCD breakdown.
21:2
GCD of 420 and 40 is 20. Simplified: 420/20 : 40/20 = 21:2
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 / 35 | 12:1 |
| 420 / 38 | 210:19 |
| 420 / 39 | 140:13 |
| 420 / 41 | 420:41 |
| 420 / 42 | 10:1 |
| 420 / 45 | 28:3 |
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.