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Simplify 420:45
The simplified ratio of 420:45 is 28:3. Free ratio calculator with GCD breakdown.
28:3
GCD of 420 and 45 is 15. Simplified: 420/15 : 45/15 = 28:3
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 |
|---|---|
| 420 / 40 | 21:2 |
| 420 / 43 | 420:43 |
| 420 / 44 | 105:11 |
| 420 / 46 | 210:23 |
| 420 / 47 | 420:47 |
| 420 / 50 | 42:5 |
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.