THE NUMBERS, EXPLAINED
How to use this calculator.
Classes are mutually exclusive and exhaustive; every entered class must have observations. Imbalance is largest class divided by smallest.
Start with your inputs
Enter class example counts (counts). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Class example counts (counts) | 10,20,70 |
A worked example
With the example inputs above, class shares (%) is 10, 20, 70. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Class shares (%) | 10, 20, 70 |
| Largest-to-smallest ratio | 7 |
| Total examples (count) | 100 |
How this is calculated
Class shares (%)
Divide each class count by the total.
Largest-to-smallest ratio
Divide largest count by smallest.
Total examples (count)
Add all class counts.
Symbols and units
- a
- Class example counts (counts)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Classes are mutually exclusive and exhaustive; every entered class must have observations. Imbalance is largest class divided by smallest.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Class shares (%); Largest-to-smallest ratio; Total examples (count). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Classes are mutually exclusive and exhaustive; every entered class must have observations. Imbalance is largest class divided by smallest.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax Prealgebra 2e — arithmetic and proportions ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
Read the quality report →