Ratio Quick Check

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 to b' or 'a:b'.

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 (GCD).

Front

What is the ratio of blue marbles to all marbles if there are 10 black marbles and 4 blue marbles?

Back

The ratio of blue marbles to all marbles is 2:7.

Front

How do you find the unit price of an item?

Back

To find the unit price, divide the total cost by the number of items. For example, if 4 books cost $27.12, the unit price is $27.12 ÷ 4 = $6.78.

Front

What is the ratio of guitars to hotdogs if there are 3 guitars and 8 hotdogs?

Back

The ratio of guitars to hotdogs is 3:8.

Front

How do you determine which item is a better buy?

Back

To determine the better buy, compare the unit prices of the items. The item with the lower unit price is the better buy.

Front

If 14 oz of a product costs $2.25, what is the unit price?

Back

The unit price is $2.25 ÷ 14 oz = $0.16 per oz.

Front

What is the ratio of blue stars to red circles if there are 7 blue stars and 4 red circles?

Back

The ratio of blue stars to red circles is 7:4.

Front

How do you convert a ratio into a fraction?

Back

Front

What does it mean if a ratio is expressed as 1:3?

Back

A ratio of 1:3 means that for every 1 unit of the first quantity, there are 3 units of the second quantity.