Percent of Change
Financial Literacy
Scale Factor
Similar Figures
Vocabulary
100
from 12 hours to 15 hours
25% increase
100
$72 jeans; 10% discount
What is the discount?
$7.20 discount
100
The distance between two cities on a map is 3.5 centimeters. The map uses a scale in which 1 centimeter represents 20 kilometers. What is the actual distance between these two cities in kilometers?
70 kilometers
100
Find the measure of x.
x = 4
100
same shape, different size
similar
200
this year: 12 days
last year: 8 days
50% increase
200
$75 dinner; 18% tip
What is the total?
$88.50 total
200
A building has a height of 125 meters and a length of 80 meters. On a scale drawing of the building, the height is 25 centimeters. What is the length of the building on the scale drawing in centimeters?
16 centimeters
200
The following figures are similar. Find the missing value.
x = 50 feet
200
having the same ratio
proportional
300
Che's grade on the first math exam was 75. His grade on the second math exam was 81. What was the percent of change in Che's grade?
8% increase
300
Inez wants to buy a skateboard but she doesn't know if she has enough money. The price of the skateboard is $80 and the sales tax is 7%. What will be the total cost of the skateboard?
$85.60 total cost
300
The distance between two cities on a map is 4.5 centimeters. The map uses a scale in which 1 centimeter represents 15 miles. What is the actual distance between these two cities in miles?
67.5 miles
300
A 6 ft tall adult casts a shadow that is 15 ft long. What is the height of a child who casts a 10 ft. shadow?
4 feet
300
matching sides and angles
corresponding
400
Last year the backgammon club had 30 members. This year the club has 24 members. Determine the percent of change in the number of members.
20% decrease
400
Josiah went to the local barber to get his haircut. It cost $18 for the haircut. Josiah tipped the barber 15%. How much tip did the barber receive?
$2.70 tip
400
An engineer created a scale in which 0.25 inches represents 2 feet. The length of the actual building is 250. What is the length in inches of the building in the scale drawing?
31.25 inches
400
A palm tree casts a shadow that is 44 feet long. A 6 ft ladder casts a shadow of 16 feet long. What is the height of the palm tree?
16.5 ft
400
same equal measurements
congruent
500
A popular brand of cell phone cases at a local store cost $12 each. If the store sells the cases for $21, what is the percent of change in the price?
75% increase
500
Malachi bought a new fishing rod. The regular price of the fishing rod was $125. He bought it on sale with a 15% discount. What was the sale price of Malachi's fishing rod?
$106.25 total
500
The ratio of width to length of the United States flag is 10:18. If the width of the flag at HSA is 4 feet, what is its length in feet?
7.2 feet
500
The following figures are similar. Find the missing value.
Hint: Draw the triangles separately!!
x = 18
500
a ratio that describes how much a shape has been scaled up or down
scale factor