Percent Problems Study Guide

Percent Problems Study Guide - MUST SHOW WORK!

7th Grade Math

Multiple Choice

Mick bought some compact discs. If sales tax was 6% and the tax on his purchase was $1.68, what was the cost of the compact discs before tax?

• $10.08
• $26.32
• $28.00
• $29.68

Multiple Choice

Joey wants to collect 20 coins from foreign countries. If he has 3 coins so far, what percent of his collection is complete?

• 7%
• 15%
• 20%
• 85%

Multiple Choice

Allie’s Bakery has 36 parking spots in front of the store. Eleven of the parking spots are currently empty. What percent of the parking spaces, rounded to the nearest percent, are filled with customer cars?

• 23%
• 31%
• 69%
• 77%

Multiple Choice

Ezra made 96 cupcakes for a bake sale at his school. Of the 96 cupcakes, 58 are chocolate and the rest are vanilla. What percent of the cupcakes are vanilla? Round answer to the nearest percent.

• 38%
• 40%
• 60%
• 62%

Multiple Choice

What is 80% of 80?

• 16
• 60
• 64
• 100

Multiple Choice

Jessica has driven exactly 90% of the distance to her friend's home. Which statement about this trip could be true?

• Jessica has driven exactly 40 miles out of a total of 360 miles.
• Jessica has driven exactly 270 miles out of a total of 360 miles.
• Jessica has driven exactly 360 miles out of a total of 400 miles.
• Jessica has driven exactly 396 miles out of a total of 400 miles.

Multiple Choice

Mei-Li uses 3 drawers in her dresser to store shirts. She uses 1 drawer to store socks. Which value represents the percentage of the drawers in the dresser that Mei-Li uses for shirts?

• 100%

• 75%

• 50%

• 25%

Multiple Choice

Amber works at a store and gets an employee discount. A skirt costs $50, and she pays $40 with her discount. How much is Amber’s employee discount?

• 10%
• 20%
• 25%
• 40%

Multiple Choice

Four different stores are selling the same item at different prices and with a variety of discounts as shown below.

• Store 1

• Store 2

• Store 3

• Store 4

Multiple Choice

An oil company drilled several wells. Fifty wells, or 25%, produced oil. What was the total number of wells that were drilled?

• 50
• 100
• 125
• 200

Multiple Choice

Set up and solve a proportion to find the answer.

42 is 30% of what number?

• 126

• 129

• 140

• 165

Multiple Choice

Set up and solve a proportion to find the answer.

12 is what percent of 50?

• 12%

• 24%

• 50%

• 65%

Multiple Choice

Set up and solve a proportion to find the answer.

Bill got 18 out of 20 free throws during practice yesterday. What was his freethrow percentage?

• 90%

• 80%

• 75%

• 70%

Multiple Choice

In percent of change problems, what is the first step you do to find the part?

• You add the numbers together.

• You don't do anything. Go ahead and set up your proportion.

• You subtract to find out how much the number changed.

• You multiply to find out how much the number changed.

Multiple Choice

Which percent proportional model is correct?

• $\frac{part}{\%}=\frac{100}{whole}$

• $\frac{part}{whole}=\frac{\%}{100}$

• $\frac{whole}{part}=\frac{\%}{100}$

• $\frac{part}{whole}=\frac{100}{\%}$

Multiple Choice

Johan's bill for food was $32.64. He left a tip of 16%. How much did he leave for a tip?

• $7.73

• $16.00

• $5.22

• $37.86

Multiple Choice

How much tax would be paid on a jacket that cost $26 if the tax rate is 8%?

• $2.06

• $2.80

• $2.60

• $2.08

Multiple Choice

Sarah earned $175 babysitting for her neighbors. If she saved 40% of her money, how much did she save?

• $22.85

• $135

• $245

• $70

Multiple Choice

A pair of shoes is on sale at 30% off the original price. If the original price is $50, what is the sale price?

• $15

• $35

• $20

• $65

Multiple Choice

Ryan bought a CD for $17, a pair of shoes for $30 and a pair of jeans for $25. The tax rate is 6%. What was the total cost of Ryan's purchases?

• $76.32

• $74.32

• $72.00

• $4.32

Multiple Choice

A pair of jeans is discounted for 30% off. If the original price is $31.50, what is the amount of discount?

• $3.15

• $3.00

• $22.05

• $9.45

Multiple Choice

Write the percent as a decimal. 
4.3%

• 4.3
• .43
• .043
• 4300

Multiple Choice

Write the decimal as a percent. 
0.37

• 37%
• 3.7%
• .37%

Multiple Choice

Convert 18 months to years. 

• 18 Years
• 1.5 Years
• .18 Years
• You cannot change it to years.

Multiple Choice

The simple interest formula is I=Prt.  What does the t represent?

• Principle
• Interest
• Time, in hours
• Time, in years

Multiple Choice

Jenna borrowed $5,000 for 3 years and had to pay $1,350 simple interest at the end of that time. What rate of interest did she pay?

• 6%
• 6%
• 8%
• 9%

Multiple Choice

Dan borrowed $2,000 for 6 months at 12% annual simple interest rate. How much interest is that?

• $120
• $144
• $1,200
• $1,440

Multiple Choice

Emilio borrows $1200 from a bank with 8% simple interest per year.  How much will he have to pay back total in 2 years?

• $150
• $192
• $1350
• $1392