Ratio Calculator
Last updated: November 5, 2026
Simplify an integer ratio and calculate its decimal and percentage relationship.
Simplified ratio
—
- First divided by second: —
- First as a percentage of second: —
- Scale factor removed: —
On this page
Quick summary: Simplify an integer ratio and calculate its decimal and percentage relationship.
Read the complete guide
Updated reference sections in this guide are in English.
What this calculator estimates
Simplify an integer ratio and calculate its decimal and percentage relationship.
How to use it
Enter First ratio value; Second ratio value. Select Calculate to update the results.
How the calculation works
The ratio is reduced by dividing both integers by their greatest common divisor.
Worked example: starting scenario
| First ratio value | 24 |
|---|---|
| Second ratio value | 36 |
| Simplified ratio | 2:3 |
|---|---|
| First divided by second | 0.6666666667 |
| First as a percentage of second | 66.67% |
| Scale factor removed | 12 |
Important limitations
Inputs must be integers and the second ratio value cannot be zero.
Part-to-part is different from part-to-whole
A 2:3 ratio means the first quantity divided by the second is 2/3, or about 66.67%. If those are the only two parts of a mixture, the first part’s share of the total is 2/(2+3) = 40%. This form reports the first divided by the second, not the share of their sum. It reduces integer components by their greatest common divisor.