Percentages 1
The cost of a certain shirt is $20 before a 5% sales tax is added. What is the total cost, including sales tax, to purchase the shirt?
$21.00
Last year, 200 students enrolled in an interior design program. This year, the number of students enrolled is 147% of last year’s number. How many students are enrolled in the interior design program this year?
294
What is 23% of 100.
23
There are a total of 840 seats in a school auditorium. During an assembly, students occupied 50% of the seats in the auditorium. How many seats did the students occupy during this assembly?
420
Lani spent 15% of her 8-hour workday in meetings. How many minutes of her workday did she spend in meetings?
72
A number n is increased 6%. If the result is 318, what is the value of n ?
300
A customer’s monthly water bill was $75.74. Due to a rate increase, her monthly bill is now $79.86. To the nearest tenth of a percent, by what percent did the amount of the customer’s water bill increase?
5.4%
432 is 96% of what number?
What number is 40% greater than 115?
161
Thomas installed a new stove in his restaurant. At the time of installation, the stove had a value of $800. Thomas estimates that each year the value of the stove will depreciate by 20% of the previous year’s estimated value. What is the estimated value of the stove exactly 2 years after Thomas installed it?
$512
The regular price of a shirt at a store is $11.70. The sale price of the shirt is 80% less than the regular price, and the sale price is 30% greater than the store's cost for the shirt. What was the store’s cost, in dollars, for the shirt?
1.8, 9/5
According to a set of standards, a certain type of substance can contain a maximum of 0.001% phosphorus by mass. If a sample of this substance has a mass of 140 grams, what is the maximum mass, in grams, of phosphorus the sample can contain to meet these standards?
0.0014
37% of the items in a box are green. Of those, 37% are also rectangular. Of the green rectangular items, 42% are also metal. What is the closest percentage of the items in the box that are not rectangular green metal items?
94.25%
The number a is 60% greater than the positive number b. The number c is 45% less than a. The number c is how many times b?
0.88, 22/25
The value of a collectible comic book increased by 167% from the end of 2011 to the end of 2012 and then decreased by 16% from the end of 2012 to the end of 2013. What was the net percentage increase in the value of the collectible comic book from the end of 2011 to the end of 2013?
124.28%
210 is p% greater than 30. What is the value of p?
600
Percentage 2 (400)
According to the 2010 Census, the adult population aged 18 years or greater of the United States in 2010 was 234,564,071. In 2010, a survey was conducted among a randomly chosen sample of adults aged 18 years or greater in the United States about their preference to live in a warm climate or a cool climate. The table below displays a summary of the survey results.
What is approximate difference between the percentage of adults aged 18–50 years who responded “warm” and the percentage of adults aged 51 years or greater who responded “warm”?
4%
The number b is 70% less than the positive number b. The number c is 60% greater than a. The number c is how many times b?
0.48, 12/25
The number a is 110% greater than the number b. The number b is 90% less than 47. What is the value of a?
9.87, 987/100
The number w is 110% greater than the number z. The number z is 55% less than 50. What is the value of w?
189/4, 47.25
Jennifer bought a box of Crunchy Grain cereal. The nutrition facts on the box state that a serving size of the cereal is 3/4 cup and provides 210 calories, 50 of which are calories from fat. In addition, each serving of the cereal provides 180 milligrams of potassium, which is 5% of the daily allowance for adults. If p percent of an adult’s daily allowance of potassium is provided by x servings of Crunchy Grain cereal per day, expresses p in terms of x ?
p = 5x
A school district is forming a committee to discuss plans for the construction of a new high school. Of those invited to join the committee, 15% are parents of students, 45% are teachers from the current high school, 25% are school and district administrators, and the remaining 6 individuals are students. How many more teachers were invited to join the committee than school and district administrators?
8
Percentages 3 (500)
The manager of an online news service received the report above on the number of subscriptions sold by the service. The manager estimated that the percent increase from 2012 to 2013 would be double the percent increase from 2013 to 2014. How many subscriptions did the manager expect would be sold in 2014?
6027
Percentages 4 (500)
The line graph shows the total amount of snow, in inches, recorded each year in Washington, DC, from 2003 to 2015. If p% is the percent decrease in the annual snowfall from 2003 to 2007, what is the value of p ?
75
The number a is 70% less than the positive number b. The number c is 80% greater than a. The number c is how many times b?
0.54, 27/50