**Ratios: Properties and Types, Ratio Formula explained …**
https://www.toppr.com/guides/business-mathematics-and-statistics/business-mathematics/ratios/

Sep 21, 2018 · A ratio is a simple mathematical term used for comparing two or more quantities that are measured in the same units. Whether it be a 4000000:1 contrast ratio formula for a new TV that you are buying, or a 16:9 aspect ratio of a movie you’re watching, we encounter ratios in our everyday life. Subsequently, we use ratios in proportion problems too you’ll encounter later on, which simply deals with the equality of two ratios.

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