Simple app to calculate proportions, rule of three, percentages.
Proportions, rule of three, cross-multiplication, percentages. This is a simple app to calculate proportions (rule of 3, cross-multiplication, percentages), by selecting incognite X and entering data. Easily calculate most common cases.
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What's new in the latest 2.40
Last updated on Jul 29, 2026
Minor bug fixes and improvements. Install or update to the newest version to check it out!
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