Ratios and Rates (Jump to: Lecture | Video )

For example, imagine a bag has 10 marbles inside of it. 7 of the marbles are red, while the other 3 marbles are blue. The ratio of red to blue can be displayed in several ways:

7:3

7 to 3

7/3

Miles per hour(mph) is a rate. An example using this rate would be “150 miles in 4 hours”.

This is a rate because two numbers with different units are being compared. 150 is measured using the unit of “miles”, while 4 is measured using the unit of “hours”.