Ratios, Rates & Proportions

Front

What is a ratio?

Back

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

Front

How do you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common divisor (GCD).

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as speed (miles per hour) or price per item.

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal, often written as 'a:b = c:d'.

Front

If the ratio of boys to girls is 6:5 and there are 18 boys, how many girls are there?

Back

15 girls.

Front

How do you find the unit price of an item?

Back

To find the unit price, divide the total price by the quantity of the item.

Front

What is the unit price of Coca-Cola if it costs $1.29 for 1.25 L?

Back

$1.03 per liter.

Front

What is the unit price of Pepsi if it costs $2.49 for 2 L?

Back

$1.25 per liter.

Front

Which is the better deal: Coca-Cola or Pepsi?

Back

Coca-Cola is the better deal.

Front

Write the ratio of Ella's balloons to Taylor's balloons if Ella has 5 and Taylor has 7.

Back

5:7.