Percent Problems 1
In Mr. H's Math class, 20% of students earned an A on a test. If there were 30 students in the class, how many got an A?
6 students
X = .20(30)
In Miranda's art class, 12% of the Flag Day art projects received a perfect score. There were 25 art projects turned in by Miranda's class. How many of the art projects earned a perfect score?
3 art projects
X = .12(25)
In Cristian's English class, 70% of the students completed an essay by the due date. There are 30 students in Cristian's English class. How many completed the essay by the due date?
21 students
X = .70(30)
A bag of Halloween candy contains 300 pieces of which 28% are red. How many pieces are red? How many pieces are NOT red?
84 pieces are red
X = .28(300)
216 pieces are not red
X = .72(300)
An art museum has been keeping track of the number of visitors it has each day, week, month, and year.
On a particular Saturday, 60% of the visitors to the art museum were students. If 144 students visited the museum, how many total visitors did the art museum have that day?
144 / .60=240
.60 = 60% ; 6 = 10%
144/6 = 24 ; 24 x 10 = 240 (10% x 10 = 100%)
240 visitors
Last month, customers for Amazon Music downloaded a total of 4,430 songs. This month, customers downloaded 7,088 songs. What percentage increase did the downloads change from last month to this month?
7,088-4,430 = 2,658
There was a 2,658 increase in songs dowloaded.
2658/4430 = .60
The 2,658 out of 4,430 is a 60% increase from last month to this month.
In Athena's science class, 15 students earned at least a 4 on a test. If there are 30 students in the class, what percentage of students earned at least a 4?
50% of the students
15 = 30X
At Ridgeview Middle School, the cafeteria served chicken nuggets 25% of the school days. If there were 176 school days, how many days were chicken nuggets served?
44 days
X = .25(176)
A quality control inspector found that 2 out of every 70 iPhones produced on an assembly line were defective. What percent of the iPhones were defective?
2.86%
2 = 70X
At Angel's Stadium, there are 6,700 box seats available. If box seats make up 20% of the total seats, how many seats are there in total?
33,500 seats
6700 = .20X
On a particular Sunday, the art museum had 285 visitors, and that was 20% of the total number of visitors for the week. How many total visitors did the art museum have that week?
285/(20%) = p/(100%) = 285(5) = p = 1,425
1,425 total visitors
Cristian bought a couch for $600. He made equal payments of 10% of the total cost. How much was each payment?
Each payment was $60.
Double Jeopardy - Get this question correct for 600 points!
Barnes & Noble has 90 employees. 70% of the employees work full-time. How many part-time employees does Barnes & Noble have?
90xx0.70 = 63
90-63 = 27
Barnes & Noble has 27 part-time employees.
Sam spent 40% of her savings to pay for a bicycle. Her parents covered the remaining amount. Sam spent $85. How much did the bike cost? How much money did Sam's parents pay?
The bike cost $212.50
85 = .40X
Sam's parents spent $127.50
Nathan threw 20 darts at a dart board. 70% of his darts hit the bull's eye. How many darts did not hit the bull's eye?
14 darts
percent of darts that did not hit bull's eye = 100% - 70% = 30%
X = .30(20)
Bonus Challenge: Send up a person in your group to Mr. H and whisper to him the answer to the following question.
In season 2, episode 35 of Spongebob Squarepants, the episode title "The Secret Box" focuses on Patrick guarding his "secret box" from Spongebob. No matter what SpongeBob does, Patrick refuses to let him see. In the end, Patrick finally gives in and shows Spongebob what is inside the box. What is inside the box?
Of the 200 bicycles at a vacation resort, 40 are not yet rented. What percent of the 200 bicycles ARE rented?
80%
160 = 200X
Forty percent of the students on a field trip love the museum. If there are 20 students on the field trip, how many love the museum?
8 students
X = .40(20)
VUSD held a board meeting. There were 40 people in attendance. 35% of the attendees were teachers. How many teachers were at the meeting?
40(0.35) = 14
A total of 14 teachers were in attendance.
If about 15% of prime-time television is devoted to commercials, how many minutes of commercials are broadcast during each hour?
9 minutes
There are 60 minutes in an hour
X = .15(60)
During a particular week, the art museum had 1,600 visitors, and that was 40% of the total number of visitors for the month. How many total visitors did the art museum have that month?
1600 / .40=4000
.40 = 40% ; 400 = 10%
1600/4 ; 400 x 10 = 4000 (10% x 10 = 100%)
4000 visitors
Last year the Green Acres Middle School cafeteria served pizza on 12% of the school days. If there were 175 school days, how many times was pizza NOT served?
154 days
Percent of days pizza not served = 100% - 12% = 88%
X = .88(175)
Last semester, 1,500 out of the 2,400 students at Redwood High School made the Honor Roll. What percent of the students did not make the Honor Roll?
37.5%
students who did not make honor roll = 2,400 - 1,500 = 900
900 = 2,400x
After a month of successful fundraising, Greyson and his classmates voted on whether to donate the money they had raised to hunger relief or to environmental causes. Out of 25 votes, 16 were for hunger relief. What percentage of the votes were for hunger relief?
16/25 = .64 = 64%
64% of the votes were for hunger relief.
A salesman keeps 20% of his sales commission. How much does he have to sell to earn $1,000?
$5,000
1,000 = .20X
During a particular month, the art museum had 2,800 visitors, and that was 8% of the total number of visitors for the year. How many total visitors did the art museum have that year?
2800/.08=35,000
35,000 visitors