Flashback Friday -Ratios

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b' or 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 unit rate?

Back

A unit rate is a ratio that compares a quantity to one unit of another quantity, often expressed as 'x per 1 unit'.

Front

How do you find the unit rate from a total distance and time?

Back

Front

What does it mean for two ratios to be equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities, meaning they can be simplified to the same fraction.

Front

How do you determine if two ratios are equivalent?

Back

Cross-multiply the ratios. If the products are equal, the ratios are equivalent.

Front

What is the ratio of girls to boys if there are 210 girls and the ratio is 7 to 5?

Back

If the ratio of girls to boys is 7 to 5, and there are 210 girls, then there are 150 boys.

Front

If the ratio of boys to teachers is 15 to 1, how many teachers are there if there are 150 boys?

Back

If there are 150 boys and the ratio of boys to teachers is 15 to 1, then there are 10 teachers.

Front

What is the ratio of chicks to total animals if there are 4 chicks and 5 total animals?

Back

The ratio of chicks to total animals is 4 to 9.

Front

What number should go in the blank to make the ratios 7:2 and 21:__ equivalent?

Back

The number that should go in the blank is 6.