Math

Solve and Simplify Ratios

Built by Kevin Glover · @gloverbuilds · Verified formula

Simplify ratios, find missing values, and scale proportions. Solve A:B = C:? problems instantly.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

Understanding Ratios
Scaling Ratios

Les Ratios

Un ratio 3:2 signifie que pour chaque 3 unités de A, il y a 2 de B. Pour adapter : multipliez les deux côtés. 3:2 pour 50 pièces : 3/(3+2) × 50 = 30 de A, 20 de B. En cuisine : un ratio 5:1 de farine:levure = 500g:100g.

Simplification

Divisez par le PGCD. 12:8 → divisez par 4 → 3:2. Les ratios expriment des proportions relatives, pas des quantités absolues.

⚡ CalcWolf Insight

Ratio questions dominate standardized tests (SAT, GRE, ACT). The most common mistake: confusing "ratio of A to B" with "fraction A/B." A 3:2 ratio means 3 parts A and 2 parts B out of 5 total parts — so A is 3/5 of the total, not 3/2.

Frequently asked questions

Comment simplifier un ratio ?▾

Divisez les deux nombres par leur PGCD. 15:10 : PGCD = 5. 15÷5:10÷5 = 3:2.

Comment augmenter une recette ?▾

Multipliez les deux côtés. Ratio 3:1 pour 1 kg total : 750g:250g. Pour 2 kg : 1 500g:500g.

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Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →