Ratio Simplifier Calculator
Simplify a two-part whole-number ratio and see how each part contributes to the total.
Your result
Review your calculated values below.
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Choose Calculate to see your result.
How to use this calculator
- Enter your values in the labeled fields, keeping the displayed units.
- Choose Calculate or press Enter in a single-line field.
- Review the result and the assumptions below before using it.
Formula and method
Divide both parts by their greatest common divisor. First-part share = a / (a + b) × 100.
Worked example
12:18 simplifies to 2:3; the first part is 40% of the combined total.
What the result assumes
Use nonnegative whole numbers. A 0:0 ratio has no defined share.
Common question
Can one side of a ratio be zero?
Yes, when the other side is positive. For example 0:5 simplifies to 0:1.