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Simplify 72:90
The simplified ratio of 72:90 is 4:5. Free ratio calculator with GCD breakdown.
4:5
GCD of 72 and 90 is 18. Simplified: 72/18 : 90/18 = 4:5
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 |
|---|---|
| 72 / 85 | 72:85 |
| 72 / 88 | 9:11 |
| 72 / 89 | 72:89 |
| 72 / 91 | 72:91 |
| 72 / 92 | 18:23 |
| 72 / 95 | 72:95 |
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.