Chapter 9 · Questions · page 52 of 68
How do you find a unit rate?
Short answerDivide the first amount by the second so the second becomes 1. 150 miles in 3 hours is 150 ÷ 3, which is 50 miles per hour.
levelPre-algebra
standard6.RP.A.2
practiceRatios and rates
A unit rate tells you how much for one of something: per hour, per pound, per minute. The word "per" is the clue that you divide by that thing.
How to use it
- Write the amount over the thing you want "per".
- Divide.
- Name the units in the answer: miles per hour, dollars per pound.
Example
Where it goes wrong
- Dividing the wrong way round. Miles per hour is miles divided by hours.
- Dropping the units, which hides whether the division went the right way.