Ratio, Rates, Proportions Checkpoint

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 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 quantities with different units, such as speed (miles per hour).

Front

What is a proportion?

Back

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

Front

How do you solve for x in a proportion?

Back

Cross-multiply the terms and then isolate x to solve the equation.

Front

If the ratio of boys to girls is 3:5, how many boys are there if there are 75 girls?

Back

There are 45 boys.

Front

Express the ratio of goats to total animals if there are 6 goats and 9 other animals.

Back

The ratio is 2:5.

Front

What is the formula to find a missing value in a proportion?

Back

Front

If you mix 12 parts of lemonade concentrate to 21 parts of water, how much water is needed for 16 parts of concentrate?

Back

You need 28 parts of water.

Front

What does it mean if two ratios are equivalent?

Back

It means they represent the same relationship between quantities.