Ratios and Proportions Unit 9

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and set the products equal to each other.

Front

If a recipe calls for 2 cups of flour for every 3 cups of sugar, what is the ratio of flour to sugar?

Back

The ratio of flour to sugar is 2:3.

Front

What is the unit rate?

Back

The unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit.

Front

How do you find the unit rate from a ratio?

Back

To find the unit rate, divide the first quantity by the second quantity.

Front

If 6 ounces of fruit snacks contain 45 pieces, how many pieces are in 10 ounces?

Back

75 pieces.

Front

If a 12-ounce shampoo bottle lasts 16 weeks, how long will an 18-ounce bottle last?

Back

24 weeks.

Front

What is the relationship between the weight of items and the number of items that can be carried?

Back

The relationship is inversely proportional; as the weight of each item increases, the number of items that can be carried decreases.

Front

If Justin can type 408 words in 4 minutes, how many words can he type per minute?

Back

102 words per minute.