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Simplify 90:85
The simplified ratio of 90:85 is 18:17. Free ratio calculator with GCD breakdown.
18:17
GCD of 90 and 85 is 5. Simplified: 90/5 : 85/5 = 18:17
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 |
|---|---|
| 90 / 80 | 9:8 |
| 90 / 83 | 90:83 |
| 90 / 84 | 15:14 |
| 90 / 86 | 45:43 |
| 90 / 87 | 30:29 |
| 90 / 90 | 1:1 |
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.