What is a ratio?

• A. The value obtained by dividing one number by another, indicating their relative proportions
• B. The sum of two quantities
• C. The product of two numbers
• D. The difference between two numbers

Answer: (A)

Ratio is the way you compare two quantities by division to see how much of one quantity there is relative to the other. It’s the division-based measure that expresses their relative size or proportion, like saying one value is twice as large as another. In electrical work, ratios show up in transformer turns (primary to secondary), impedance or voltage-current relationships, and other circuit comparisons where you’re looking at how one part relates to another. The idea is a division result that conveys how many times bigger one quantity is compared with the other. The other operations—adding, multiplying, or subtracting—give total amounts, scaled results, or differences, not a direct sense of relative size between two quantities.