Ratios & Ratio Tables

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

How do you write a ratio?

Back

Ratios can be written in three ways: as a fraction (a/b), with a colon (a:b), or with the word 'to' (a to b).

Front

What is a ratio table?

Back

A ratio table is a table that shows the relationship between two quantities, listing pairs of numbers that maintain the same ratio.

Front

If the ratio of apples to oranges is 2:3, how many oranges are there if there are 8 apples?

Back

There are 12 oranges. (Using the ratio 2:3, if 2 parts = 8 apples, then 3 parts = 12 oranges.)

Front

What is a proportion?

Back

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

Front

Back

x = 6.

Front

What is the cross-multiplication method?

Back

Cross-multiplication is a method used to solve proportions by multiplying the numerator of one ratio by the denominator of the other ratio.

Front

Back

The cross-multiplication equation is: a * d = b * c.

Front

Find the missing value in the ratio: 4: x = 12: 9. What is x?

Back

x = 3.

Front

What is the missing value in the ratio table if the ratio is 5:10 and the first value is 15?

Back

The missing value is 30.