Ratios
In a jar of 55 marbles, 17 are red, 14 are yellow, 19 are blue and 5 are white. What is the ratio of red marbles to blue marbles?
17 to 19, 17:19, 17/19
Robin bought 5 pounds of apples for $15. What is the cost of one pound of apples?
$3
Are these ratios equivalent?
12:20
9:15
yes
23 is 11% of what number?
209.1
Josh paid $7.25 for 22 stamps. At this rate, how much would it cost Sam to buy 12 stamps?
$3.95
There are 42 marbles in a bag. There are 12 green marbles, 8 red marbles, 10 blue marbles, 8 white marbles and 4 black marbles. What is the ratio of green to blue marbles?
6 to 5
Martha walks 4 miles in 1 hour. At this rate, how long will it take her to walk 14 miles?
3.5 hours
To make equivalent ratios, you must ___________ or _______________ both quantities of the ratio by the same number.
multiply, divide
In the word "CALCULATOR" what percent of the letters are vowels?
40%
Maria needs to order pizza for a party. She usually orders 2 pizzas for every 8 people. If she is expecting 48 people to come to the party, how many pizzas should she order?
Write the ratio as a fraction in simplest form
54:63
6 : 7
4 movie tickets cost $28
7 movie tickets cost $49
10 movie tickets cost $70
12 movie tickets cost $84
How much does one movie ticket cost?
$7 per ticket
Are these ratios equivalent?
20 pies to 44 cakes
14 pies to 26 cakes
no
What is 74% of 250?
185
Robin can clean 72 rooms in 6 days.
How many rooms can Robin clean in 9 days?
108 rooms
What are the three different ways to write a ratio?
As a fraction
With a colon (:)
Using the word "to"
45.5 meters in 13 seconds is how many meters per second?
3.5 meters per second
A _______________ is two ratios that are set equal to each other.
Proportion
Todd made 9 out of the 30 shots he took at the basketball game. What percent of his shots did he make?
30%
A chicken laid 5 eggs every 7 days. At this rate, how many eggs would it lay in February, which has 28 days?
Jason counts 3 red cars for every 4 white cars in the parking lot. How many red cars are there if there are 12 white cars?
9 red cars
Randa is comparing dog food prices. Kroger has Purina dog food at a price of $21.99 for a 40 pound bag. Walmart has the same dog food at a price of $23.45 for a 45 pound bag. Which store has the better price per pound?
Kroger's price is $0.55 per pound.
Walmart's price is $0.52 per pound.
Walmart has the better price.
The ratio of boys to girls in class is 5:4. If there are 54 students in the class, how many are boys?
30
A sweater with a retail price of $85 is on sale at a 20% discount. What is the sale price of the sweater?
$68
It takes Megan 16 minutes to go 1 mile on horseback. At this rate, how long will it take Megan to go 9 miles? (Answer in minutes.)
144 minutes