2:1 (Ratio)
A 2:1 ratio means that for every two parts of one quantity, there is one part of another quantity. This can be applied in various contexts, such as mixing ingredients in cooking or comparing sizes. For example, if you have 2 cups of flour and 1 cup of sugar, the ratio of flour to sugar is 2:1.
Ratios can also be used to describe relationships between numbers or objects. In a classroom with 20 students and 10 desks, the ratio of students to desks is 2:1, indicating that there are twice as many students as desks available. This helps in understanding proportions and resource allocation.