SCReady Review: Ratios and Proportional Relationships

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a:b'.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 20% becomes 0.20.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together. It is often expressed as a quantity per one unit of another quantity.

Front

If Elijah earns $200 for 8 hours of work, what is his unit rate?

Back

$25 per hour.

Front

What is the ratio of girls to boys if there are 48 boys and the ratio is 3:8?

Back

18 girls.

Front

How do you find 20% of a number?

Back

To find 20% of a number, multiply the number by 0.20. For example, 20% of 15 is 15 * 0.20 = 3.

Front

If Mrs. Patrick bought 15 expo markers and 20% were blue, how many were blue?

Back

3 blue markers.

Front

What is the decimal equivalent of 31%?

Back

0.31.

Front

How do you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both terms of the ratio by their greatest common divisor.

Front

What is a proportion?

Back

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