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 scale a ratio up or down?

Back

To scale a ratio, multiply or divide both parts of the ratio by the same number.

Front

If the ratio of 6th graders to 7th graders is 4:1, how many 6th graders are there if there are 8 7th graders?

Back

There are 32 6th graders.

Front

What is a proportion?

Back

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

Front

How do you find the missing piece of a proportion?

Back

Cross-multiply the known values and solve for the unknown.

Front

What is an example of a real-life ratio?

Back

4 meatballs : 1 cup of sauce.

Front

If a local Rec League orders 8 soccer balls for every 12 students, how many soccer balls are needed for 48 students?

Back

32 soccer balls.

Front

What does it mean to simplify a ratio?

Back

To simplify a ratio means to reduce it to its smallest form by dividing both parts by their greatest common divisor.

Front

What is the greatest common divisor (GCD)?

Back

The GCD is the largest number that divides two or more numbers without leaving a remainder.

Front

How can ratios be expressed?

Back

Ratios can be expressed as fractions, with a colon (:) or with the word 'to'.