Ratios and Proportions

Front

What is a Ratio?

Back

A ratio is a comparison of two quantities.

Front

Solve the proportion: 3/5 = k/15. What is k?

Back

k = 9

Front

The ratio of cats to dogs in a pet store is 2:3. If there are 30 pets in total, how many are cats?

Back

12 cats

Front

What is a Proportion?

Back

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

Front

If the ratio of boys to girls in a class is 4:5 and there are 36 students, how many are girls?

Back

20 girls

Front

Solve the proportion: 8/x = 4/2. What is x?

Back

x = 4

Front

The ratio of apples to oranges is 3:2. If there are 15 apples, how many oranges are there?

Back

10 oranges

Front

What does it mean if two ratios are equivalent?

Back

It means they represent the same relationship between quantities.

Front

If a recipe calls for a ratio of 2:1 for flour to sugar and you use 4 cups of flour, how much sugar do you need?

Back

2 cups of sugar

Front

What is the scale of a drawing?

Back

The scale of a drawing is the ratio of the size of the drawing to the size of the actual object.