Ratios and Proportions Review

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 convert feet to yards?

Back

To convert feet to yards, divide the number of feet by 3, since 1 yard equals 3 feet.

Front

What is a proportion?

Back

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

Front

How do you find the constant of proportionality in a proportional relationship?

Back

The constant of proportionality is found by dividing one quantity by the other in a ratio.

Front

If 1 foot = 12 inches, how many inches are in 7 feet?

Back

7 feet = 7 x 12 = 84 inches.

Front

What is the formula for finding the perimeter of a rectangle?

Back

The perimeter P of a rectangle is given by the formula P = 2(length + width).

Front

What is the constant of proportionality in the equation y = 14x?

Back

The constant of proportionality is 14.

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.

Front

What is the ratio of red toy cars to all toy cars if Patrick has 2 black, 3 red, and 5 white toy cars?

Back

The ratio of red toy cars to all toy cars is 3:10.

Front

What does it mean if two quantities are in direct proportion?

Back

If two quantities are in direct proportion, as one quantity increases, the other quantity increases at a constant rate.