A ratio is a way to compare two quantities by showing how many times one value contains another. It is often written in the form of "a to b" or as a fraction a/b . For example, if there are 3 apples and 4 oranges, the ratio of apples to oranges is 3:4 or Ā¾ .
A rate is a special type of ratio where the two quantities being compared have different units. For example, if you travel 60 miles in 2 hours, the rate is 60 miles per 2 hours, or 30 miles per hour.
A proportion is an equation that states two ratios are equal. For example, if a/b=c/d , then the ratios are proportional.
Proportions are used in various everyday situations, such as determining how much paint is needed to cover a wall based on its size, converting currency, or figuring out the nutritional information of food based on serving sizes.
The unit rate is a rate in which the second quantity is 1 unit. For example, if 5 apples cost $10, the unit rate is $2 per apple (because $10 divided by 5 apples equals $2 per apple).