Financial Formula
Percent Change
Proportions/ Unit Rates
Proportional Relationships
Compound and Simple Interest
100

A salesperson earns 5% commission on a $2,000 sale. How much commission did they earn?

A)150

B)200

C)100

D)10

What is $100

100

A video game costs $50 and increases by 10%. What is the new price?

What is $55

100

A store sells 4 notebooks for $6. What is the cost of 10 notebooks?

What is $15

100

A survey found that 4 out of every 9 students at a school participate in after-school activities. 320 students participate in an after-school activity.

Which THREE proportions could be used to determine the total number of students, p?

A. 4/9=320/p

B. 9/4=p/320

C. 4/320=9/p

D. 9/320=4/p

E. 320/4=p/9


What is A,B,C

100

Maria deposits $1,000 into a savings account that earns 4% interest compounded annually. Which expression can be used to find the balance after 3 years?

A. A=1000(0.04)(3)

B. A=1000(1+0.04)3

C. A=1000(1+3)0.04

D. A=0.04(1000)3

What is B)A=1000(1+0.04)3

200

A jacket originally costs $80 and is on sale for 25% off. The discount is $20. What is the sale price?

A)80
B)40
C)26
D)60

What is $60

200

A shirt costs $40 and is marked down 15%. What is the sale price?

What is $34

200

A car travels 180 miles in 3 hours. What is its unit rate?

What is 60 miles per hour 

200

A school has 3 teachers for every 75 students. If there are 500 students, how many teachers would be needed at the same rate?

Which TWO proportions could be used?

A. 3/75=x/500
B. 75/3=500/x
C. 3/500=75/x
D. 75/500=x/3

What is A and B

200

Kim borrowed $4,000 at 7% simple interest for 5 years.

Which expression can be used to find the total interest owed?

A. I=4000(0.07)(5)I=4000(0.07)(5)

B. I=4000(1.07)5I=4000(1.07)^5

C. I=4000(5.07)I=4000(5.07)

D. I=0.07(4000)5

 What is A)  I=4000(0.07)(5)I=4000(0.07)(5)

300


A pair of shoes costs $50 and sales tax is 8%. The total cost is $54. What is the sales tax amount?

A)4.40
B)17
C)4
D)8

What is $4

300

A concert ticket costs $120 and increases by 30%. What is the new price

what is $156

300

A proportional relationship has a constant of proportionality of 4.5. If x=8, what is y?

What is $36

300

A recipe uses 4 cups of flour for every 6 cups of sugar. If a baker uses 12 cups of sugar, how many cups of flour are needed?

Which proportion could be used to solve the problem?

A. 4/6=x/12
B. 6/4=12/x
C. 4/x=12/6
D. 6/12=4/x

What is A,B,C,D

300

The formula for compound interest is:

A=P(1+r)tA=P(1+r)^t

An account starts with $4,500 and earns 7% interest compounded annually.

Which expression represents the balance after 6 years?

A. A=4500(0.07)(6)A=4500(0.07)(6)

B. A=4500(1.07)6A=4500(1.07)^6

C. A=4500(1.06)7A=4500(1.06)^7

D. A=0.07(4500)6

What is B) A=4500(1.07)6A=4500(1.07)^6

400

A restaurant bill is $40. A customer leaves a 20% tip. What is the tip amount?

A)8
B)8.18
C)6
D)6.74

What is 8

400

The number of books in a library increased from 200 to 250. What is the percent increase?

what is 25%

400

Which is the better deal?

  • Option A: 12 pencils for $3.60

  • Option B: 20 pencils for $5.00

Find the unit price for each and determine which has the lower cost per pencil

What is Option B

400

A movie theater sells 5 tickets for $45. how much would 12 tickets cost?

Which THREE proportions could be used?

A. 5/45=12/x
B. 45/5=x/12

C. 5/12=45/x
D. 45/12=x/5
E. 5/x=12/45

What is A,B,C

400

James invests $1,200 at 5% simple interest for 4 years.

Which expression could be used to find the interest earned?

A. I=1200(1.05)4I=1200(1.05)^4

B. I=1200(0.05)(4)I=1200(0.05)(4)

C. I=1200(4.05)I=1200(4.05)

D. I=1200+0.05+4

What is B) I=1200(0.05)(4)I=1200(0.05)(4)

500

Kyla and her friend go out to eat. Their meal costs $80.

  • They use a 15% off coupon on the meal.
  • After the discount, they must pay 8.25% sales tax.
  • They leave a 20% tip based on the discounted meal price before tax.

What is the total amount they will pay?

A. $84.76

B. $88.72

C. $87.21

D. $92.80

What is C) 87.21

500

The price of a bicycle dropped from $400 to $340. What is the percent decrease?

What is 15%

500

A grocery store sells 3 pounds of apples for $7.50. Another store sells 5 pounds for $11.00. Which store has the lower unit price?

What is the second store

500

A school survey found that 2 out of every 7 students prefer pizza for lunch. If 126 students chose pizza, how many students participated in the entire survey?

Which THREE proportions could be used?

A. 2/7=126/p
B. 7/2=p/126
C. 2/126=7/p
D. 7/126=2/p
E. 126/2=7/p

What is A,B,C 

What is 441

500

Maria and Jordan each invest $2,000 for 4 years.

  • Maria's account earns 5% simple interest annually.
  • Jordan's account earns 5% interest compounded annually.

Which statement is true?

A. Maria and Jordan will have the same amount after 4 years.

B. Maria will have more money because simple interest is easier to calculate.

C. Jordan will have more money because compound interest earns interest on both the principal and previously earned interest.

D. Jordan's account balance will be exactly $2,400.

What is C