Ratios and Proportions

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 then solve for the unknown variable.

Front

What is the simplest form of a ratio?

Back

The simplest form of a ratio is when the numbers are reduced to their smallest whole number values.

Front

How do you find the ratio of boys to girls in a class?

Back

To find the ratio of boys to girls, divide the number of boys by the number of girls.

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 determine which deal is better when comparing prices?

Back

To determine which deal is better, calculate the unit price for each option and compare them.

Front

What is the ratio of red LEGOS to yellow LEGOS if there are 3 red and 6 yellow?

Back

The ratio of red to yellow LEGOS is 1:2.

Front

If a recipe requires 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 does it mean to scale a ratio?

Back

Scaling a ratio means to multiply or divide both terms of the ratio by the same number to maintain the same relationship.