The word "ratio" refers to a quantitative relationship between two numbers or amounts, showing how many times one value contains or is contained within the other. It is often expressed as a fraction, decimal, or with a colon (e.g., 3:1). Ratios are used in various fields like mathematics, finance, and science to compare quantities or to understand relationships between different figures.
The word "ratio" comes from the Latin "ratio," which means "reason, calculation, or proportion." This term is derived from the verb "ratiōnāre," meaning "to calculate" or "to reason."