Proportions and Solving Proportions

Front

What is a proportion?

Back

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

Front

What does it mean for two ratios to be proportional?

Back

Two ratios are proportional if they can be expressed as equivalent fractions.

Front

Solve the proportion: 3/4 = x/12

Back

x = 9

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

If the ratio of cats to dogs is 2:3, how many dogs are there if there are 10 cats?

Back

There are 15 dogs.

Front

What is the simplest form of the ratio 8:12?

Back

The simplest form is 2:3.

Front

Fill in the missing number: 4/x = 2/8

Back

x = 16

Front

Which ratio is proportional to 1/2?

Back

2/4 is proportional to 1/2.

Front

What is the ratio of 5 apples to 10 oranges in simplest form?

Back

The simplest form is 1:2.

Front

If there are 20 students in a class and 5 are wearing glasses, what is the ratio of students wearing glasses to those not wearing glasses?

Back

The ratio is 5:15 or 1:3.