Ratios and Rates

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

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 'per' something (e.g., miles per hour).

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity to find the amount per one unit of the second quantity.

Front

If I can ride my bike 40 miles in 4 hours, what is my speed in miles per hour?

Back

Front

Serena makes $240 an hour teaching tennis. How much does she make per minute?

Back

Front

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

Back

The ratio of boys to girls is 5:7.

Front

Which of the following is NOT a correct ratio of boys to girls if there are 5 boys and 7 girls?

Back

7 to 5 is NOT a correct ratio.

Front

How do you express the ratio of chocolate lovers to vanilla lovers if 50 people like chocolate and 75 like vanilla?

Back

The ratio is 50:75, which simplifies to 2:3.

Front

What is the first step in simplifying a ratio?

Back

The first step is to divide both quantities by their greatest common factor.

Front

What does it mean if a ratio is expressed as 3:4?

Back

It means for every 3 parts of one quantity, there are 4 parts of another quantity.