Overview
A ratio compares two quantities. The ratio 12:18 means that for every 12 units of the first part there are 18 units of the second, and it simplifies to 2:3. This calculator shows the simplified ratio and percentages.
Formula
Ratio = a : b, and its value = a ÷ b. Percentage = (part ÷ total parts) × 100.
How it works
Enter both parts
Use two positive numbers.
Simplify the ratio
Divide both parts by their greatest common divisor, aligning decimal places when needed.
Read the result
The simplified ratio, decimal value and percentages appear.
Worked examples
Example 1: 12:18
Simplifies to 2:3 because the greatest common divisor is 6.
Example 2: 1.5:2.5
Multiply both by 10 to get 15:25, then simplify to 3:5.
Frequently asked questions
What does simplifying a ratio mean?
Dividing both parts by the same common factor without changing the relationship between them.
Can I use decimals?
Yes. The decimal places are aligned, then the ratio is simplified.
Is a ratio the same as a fraction?
A ratio is similar to a fraction in value, but it compares two quantities and can be written as a:b.
This calculator is for educational and informational purposes only and is not a substitute for professional advice.