Ratio to Percentage Conversions
There are two main ways to convert a ratio to a percentage.
1. Direct Conversion (Ratio as Fraction)
This treats the ratio A:B as the fraction A/B.
Formula: (A ÷ B) × 100
This is useful for slopes, zoom levels, or comparisons like "A is what percent of B".
2. Part-to-Whole
This assumes A and B are parts of a whole group (Total = A + B).
Formula for A's share: (A ÷ Total) × 100
This is useful for mixtures, demographics, or sharing.
Frequently Asked Questions
How do you turn a ratio into a percentage?
If the ratio is A:B, divide A by B and multiply by 100. (A ÷ B) × 100 = Percentage.
What percentage is the ratio 1:4?
1 ÷ 4 = 0.25. Multiply by 100 to get 25%. If interpreting as part-to-whole (1 part out of 5 total), it would be 20%.
What is the difference between direct percentage and part-to-whole?
Direct percentage treats the ratio as a fraction (1:2 = 1/2 = 50%). Part-to-whole treats the ratio as parts of a total sum (1:2 means 1 part A + 2 parts B = 3 total parts, so A is 33.3%).