Percentages practice problems - page 34 of 110
Number of problems found: 2186
- Original 63974
If we reduce the length of the cube edge by 30%, this cube has a reduced surface area of 1176 cm². Find the edge length and volume of the original cube. - Percentage 63864
Through the first pipe, 90 hl of water flows into the tank per hour, and 2.7 l of water per second through the second pipe. Calculate by what percentage more or less water flows per unit time into the tank through the second pipe than through the first pi - Extinguishing 63834
During the fire extinguishing exercise, 40% of the foam was sprayed from the foam fire extinguisher. The entire device weighed 7 kg, and after training, it dropped to 4.6 kg. What was the weight of the empty device? - Employees 63594
4020 employees work in the car plant. 35% of the work by bus, 40% by car, and the rest by bike. How many employees go to work by bike? - Cheaper 63574
The book was twice as 10% cheaper as € 5.60. How much does it cost now - The sides 6
The sides of the rectangle are 12cm and 15cm. How many percent will the area of the rectangle increase if we increase each side by 10%? - Municipalities 63534
The tachometer with a relative measurement error of 5% showed a speed of 49 km/h when crossing municipalities. Did the car driver exceed the permitted speed of 50 km/h?
- Estefania
Estefania bought a video game player. She does not remember the price before tax. She does know that the 6% sales tax came to $4.80. To find the price of the game player, she drew a percent bar or tape diagram. What was the price of the game player before - Probability 63324
The shooter fired 100 times on the ground. He had four times more successful hits than failed hits. What was the probability of a hit in percent? - Probability 63304
One hundred fifty pupils go to the 9th year of primary school. Of these, 66 have no siblings, 39 pupils have one sibling, 18 pupils have two siblings, and the remaining pupils have more siblings. What is the percentage probability that a randomly selected - Weighs 63254
The water court weighs 520 kg. The weight of the barrel is 60% of the total weight. What is the mass of water? - Original 63184
If you reduce the unknown number by 90, you get 88% of its original value. Specify this unknown number. - Drinks
In a country, 65% of people drink coffee, 50% drink tea, and 25% drink both. What is the probability that a person chosen at random will drink neither tea nor coffee? - Discounted 63084
The product was discounted by 15% and the price after the discount is 300 euros. How much did it cost before the deal? - Smaller 63064
From which number is the number 60 20% smaller?
- 68-95-99.7 rule
Assume the resting pulse rates for a sample of individuals are normally distributed with a mean of 70 and a standard deviation of 15. Use the 68-95-99.7 rule to find the following quantities. a. Percentage of pulse rates less than 70 b. Percentage of puls - Installment 62884 It is to be paid annually 12x 1935 CZK. The third installment is not paid - it is 2.5 permille per day. What debt will be incurred at the end of the year?
- Regular 62524
The floor in the game tower has the shape of a regular hexagon with a side length of 5m. How many pieces of parquet must be ordered to cover it if 25 pieces are needed for 1 square meter, and we must add a reserve of 10%? - Withdrawals 62324
A person deposits 5,000 euros into a bank account at the beginning of each year for 10 years. He does not make any other deposits or withdrawals from the account. Determine the total amount saved at 8% compounded annually when interest is compounded annua - Cross-country 62244
How many cross-country skis have risen in price if they increased the original price of € 75 to € 90
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