Percentages practice problems - page 69 of 110
Number of problems found: 2186
- Left handed
It is known that 25% of the population is left-handed. What is the probability that there is a maximum of three left-handers at a seminar with 30 participants? - Butter
The same amount of butter is cut evenly from a cuboid every day. In seven days we used so much butter that all its dimensions were halved. a) How much percent of butter do we still have left? b) How many days will the butter last if we continue to cut the - Probability 7154
82% of football players, and 26% are hockey players at school. What is the probability that: A) I'm not a hockey player B) I know both sports C) I know one sport - The sales
The sales tax rate is 4.447% for the city and 4% for the state. Find the total amount paid for two boxes of chocolates at $17.96 each. - Number 7148
Find a number that is 14% as much as 5% of 196 - Component fail
There is a 90 percent chance that a particular type of component will perform adequately under high-temperature conditions. If the device involved has four such components, determine the probability that the device is inoperable because precisely one of t - Enrolled: 7135
In day mode, Jirka enrolled: sleep 50%, learning 25% free time (fun + help at home) 25%. How many hours a day does he spend on each activity?
- Prime number
Jan wrote any number from 1 to 20. What is the probability that he wrote the prime number? - Percentage 7129
The shop reduced the original price of the skis by 20% in January. They reduced the new price by another 20% at the beginning of February. By what percentage was the price of the skis lower than the original price? - Drying herbs
Herbs lose 75% of weight by drying. How many fresh herbs do you have to collect if you want to make 1.5 kg of dried herbs? - Winery
The wine processing plant sold 8/15 of its total wine production to the domestic market and 2/7 to foreign the rest of the wine. How many percents are still in stock? - Deposited 7096
Mr. Novák deposited CZK 50,000 a year in the bank at an annual interest rate of 4%. How much will pre-tax interest be after one year? - The crime
The crime rate of a certain city is increasing by exactly 7% each year. If there were 600 crimes in 1990 and the crime rate remains constant each year, determine the approximate number of crimes in 2025. - Boys and girls
There are eight boys and nine girls in the class. There were six children on the trip from this class. What is the probability that: a) only boys went on the field trip b) just 2 boys went on the field trip - There
There are 32 trees of three species in the orchard. 25% cherries, three eighty pears, and other plums. How many plums are in the orchard?
- The cube
The cube has an edge of 12 dm. The second cube has an edge exactly 20% longer. How much % more water is in the second cube than in the first cube if the first cube is full to 3/4 and the second to 3/8? - Mixed with percentages Calculate 33 1/3% of 570.
- Inverted nine
In the hotel Inverted Nine, each hotel room number is divisible by 6. How many rooms can we count with the three-digit number registered by digits 1, 8, 7, 4,9? - Discount
The dress was discounted by CZK 115, which was 12% of the original price. What is the cost of the dress after the discount? - Square metal sheet
We cut out four squares with a 300 mm side from a square sheet metal plate with a side of 0.7 m. Express the fraction and the percentage of waste from the square metal sheet.
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