Ratios
What is a ratio?
A comparison of 2 quantities
a to b or a:b
What is a unit rate?
A rate where the second quantity is 1
How do you calculate the unit price?
divide the cost by the item
If the ratio of cats to dogs is 3:4, what is the equivalent ratio when the number of cats is 9?
12
If there are 3 apples and 4 oranges, what is the ratio of apples to oranges?
3:4 or 3 to 4 or 3/4
If a car travels 120 miles in 2 hours, what is the unit rate in miles per hour?
55 miles per hour
If a 12-pack of soda costs $6, what is the unit price per can?
$2 per can
Are the ratios 5:8 and 10:16 equivalent? Explain why or why not.
yes because 10:16 is 5:8 doubled
How can you express the ratio of 10 to 5 in simplest form?
2:1
2 to 1
2/1
If a person buys 4 notebooks for $13, what is the unit price per notebook?
$3.25 per notebook
If a gallon of milk costs $4.50, what is the unit price per quart?
$1.13 per quart
Find the missing term: 7:___ = 21:12
4
If a recipe requires 2 cups of flour to 3 cups of sugar, what is the ratio of flour to sugar?
2:3
2 to 3
2/3
A runner completes 15 miles in 1.5 hours. What is their speed in miles per hour?
10 miles per hour
A store sells 5 pounds of bananas for $3. What is the unit price per pound?
$0.60 per pound
If a recipe calls for 2 cups of sugar to 5 cups of flour, how much sugar is needed for 20 cups of flour to keep the ratio equivalent?
8 cups of sugar
If the ratio of boys to girls in a classroom is 5:7, how many boys are there if there are 35 girls?
25
If you earn $150 for 3 hours of work, what is your hourly wage?
$50 per hour
An order of 3 sandwiches cost $17.25. What is the unit price per sandwich?
$5.75 per sandwich
The ratio of boys to girls in a class is 4:7. If there are 28 girls, how many boys are there?
16 boys