Percentages practice problems - page 8 of 110
Number of problems found: 2192
- IQ scores
IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What percentage of the population scores higher than 125 on an IQ test? - Charter flying service
Henry and Wayne operate a charter flying service out of Breckenridge, which has an elevation of 9,600 feet above sea level. Henry has two flights scheduled for the day. He is taking a couple from Breckenridge to Hamilton, which has a 35% elevation drop. A - The enrolment 2
The enrolment at a school has increased from 1400 learners to 1600 learners over 5 years. What is the percentage increase in enrolment? - Petra 6
Petra sold an item for 4000 and made a 40% profit. What was the cost price of the product?
- Drunken drivers
40% of drivers driving between 11 pm and 5 am are drunken drivers. In a random sample of 20 drivers driving between 11 pm and 5 am, find the probability that: A) Exactly 12 will be drunken drivers B) At least 7 will be drunken drivers C) At most 5 will be - Healthier snacks
In hopes of encouraging healthier snacks at school, Dan brought in a tray of carrot sticks and apple slices to share. The tray had a total of 40 snacks, of which 60% were carrot sticks. How many carrot sticks did Dan bring? - Award
Out of 36 students, 16 were awarded, 19 passed, 1 failed. Determines the percentage of honors and successful students in the class. - Population - growth
China's population in 2001 was 1276300000, and in 2005 it was 1307600000. Find the increase in population. - Cosine - legs
Using the law of cosines, find the measurement of leg b if the givens are β=20°, a=10, and c=15.
- Bag of popcorn
The average cost of a bag of popcorn at the movie theater was $3.50 in 1995 and $4.75 in 2015. Find the percent of change in the price of a bag of popcorn from 1995 to 2015 and classify it as a percent increase or percent decrease. - In 2010 In 2010, the population of the city was 223,000. From 2010 to 2015, the population grew by 6%. From 2015 to 2020, it fell by 4%. To the nearest 100 people, what was the population in 2020?
- Value of the note A 10-month promissory note issued on March 21, 2021, bearing interest of 7.2% p.a., has a maturity value of $4128.02. Find the face value of the note.
- Cesar
Cesar increased the amount of water he drinks each day from 64 ounces to 72 ounces. By what percentage did Cesar increase the amount of water he drinks each day? - Cheesecakes
In a survey, 50% of people preferred fruit cake, 15% preferred sponge cake, and the remainder preferred cheesecake. What percentage of people liked cheesecake the best?
- Children Of the estimated 2 billion children living in the developing world, approximately 400 million do not have access to safe drinking water. Approximately what percentage of children in developing countries do not have safe water to drink?
- Defect rate
A manufacturing machine has a 3% defect rate. If 9 items are chosen randomly, what is the probability that at least one will have a defect? - Express 72 Express the percentage to a fraction. 15%
- A mortgage
A mortgage company charges borrowers $3.50 plus 2% of the loan amount. What is the total charge to get a home loan of $190,000? - Convert 8 Convert 11/2 into a percent?
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