Ratios
A comparison between two or more numbers is called a______
ratio
If Mimi drives 50 miles in 2 hours, what is her rate (speed per hour)?
25 miles per hour
Are they equivalent ratios?
2/3 and 4/6
Yes! x2
Convert to a decimal and a percent:
3/5
0.6 and 60%
What are the 2 ways to write an equivalent ratio?
A Adding
B Subtracting
C Multiplying
D Dividing
C, D Multiplying and Dividing
If 10 bags of Hot Cheetos cost $3.50, then how much does 1 cost?
$0.35
Are they equivalent ratios?
1/6 and 2/7
No
16.2
Write 3 ratio statements for this scenario: There are 22 vehicles in a lot. 10 are motorcycles and 12 are cars.
10 motorcycles: 12 cars
10 motorcycles: 22 vehicles
12 cars: 22 vehicles
5 motorcycles: 6 cars
(or any reverse or these!)
Which is the better deal $20 for 5 t-shirts or $24 for 8 t-shirts?
$24 for 8 t-shirts (rate of $3 per shirt)
Are they equivalent ratios?
15:30 and 3:6
Yes! /5
Convert to a decimal and a percent:
1/6
0.1666 and 16.6%
Draw a tape diagram to represent the situation and solve. The ratio of cats to dogs is 5:2. If the total number of pets is 42, how many are cats?
Tape diagram should have a line labeled cats with 5 boxes and a line labeled dogs with 2 boxes. 42/7 boxes=6 per box, so there are 5x6=30 cats
Bella earns $39 in 3 hours. How much does she make in 5 hours?
$65
Are they equivalent ratios?
6/8 and 9/12
Yes! x1.5
A triangle has area 27 units2. The base is 9 units. What is the height?
6 units
Natalie makes hot chocolate with 1.5 cups milk and 4 scoops powder. Tassia makes hot chocolate with 1 cup of milk and 3 scoops powder.
Whose is more chocolatey?
*Answer must include rate calculations to compare (can use double number line)
Tassia!
Sample reasoning: In 3 cups milk Natalie would use 8 scoops powder and Tassia would use 9 scoops.
If Mario types 60 words in 2.5 minutes, then how many words can he type in one hour?
1,440 words
Are they equivalent ratios?
18:24 and 12:16
Yes! x 2/3
A $22 shirt is marked as 15% off. What is the new price?
$18.70