Interactive resource
Interactive Ratio Bar for a:b
Arithmetic. A bar model for ratios: simplify a:b and see each part as a percent of the whole. Free interactive GeoGebra resource — adjust parameters in the…
Overview
A ratio compares two quantities. The bar makes a:b visible and links to percents.
Explanation
The ratio a:b compares two quantities and equals the fraction a/b.
Simplify by dividing by the GCD.
a's share of the whole is a/(a+b), often linked to percents.
How to use
- Open the ratio-bar scene.
- Adjust a and b.
- Read the simplified ratio.
- See each part as a percent of the whole.
Real-world prompt
Use 2:3 for drink concentrate to water, then simplify or scale the ratio.
Knowledge points
FAQ
How does this relate to fractions?
The ratio a:b matches the fraction a/b and percent shares.
Is this tool free?
Yes. It runs in the browser with no install.
Good for class demos?
Yes — project it and ask what changes when you drag a parameter.
How do I write the formula afterward?
Open the equation editor or symbol sheet and copy a clean expression.