How do you simplify a ratio?

Divide both parts by their Greatest Common Factor (GCF). For 12:8, GCF=4, so 12÷4 : 8÷4 = 3:2.

What is the difference between a ratio and a fraction?

A ratio A:B compares two quantities; the fraction form is A/B. Ratios can describe part-to-part relationships (3:2 boys to girls), while fractions describe part-to-whole (3/5 of the group are boys).

What does ratio as a percentage mean?

A/(A+B) × 100 gives you the percentage that A is of the total. For 3:2, A/(A+B) = 3/5 = 60%.

Ratio Calculator

Enter A and B to simplify A:B to lowest terms and convert it to a fraction, decimal, and percentage.

A ratio compares two quantities. This calculator simplifies ratios to their lowest terms (e.g., 4:6 → 2:3) using the GCF, and converts the ratio to a fraction, decimal, and percentage of the total.

Last reviewed: April 2026Report an error

Simplified Ratio

2 : 3

4 : 6 simplifies to 2 : 3 (0.666667 as a decimal, 40% of the total)

Simplified

2 : 3

Fraction

2/3

Decimal

0.666667

A% of Total

40%

How to Use This Ratio Calculator

Enter the two values A and B of your ratio.
Read the simplified ratio (lowest terms).
See the equivalent fraction, decimal, and percentage.

Frequently Asked Questions

: Divide both parts by their Greatest Common Factor (GCF). For 12:8, GCF=4, so 12÷4 : 8÷4 = 3:2.
: A ratio A:B compares two quantities; the fraction form is A/B. Ratios can describe part-to-part relationships (3:2 boys to girls), while fractions describe part-to-whole (3/5 of the group are boys).
: A/(A+B) × 100 gives you the percentage that A is of the total. For 3:2, A/(A+B) = 3/5 = 60%.

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Ratio Calculator

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