Percentages practice problems - page 112 of 114
Number of problems found: 2275
- Guess number
With what number should be divided, number 10387 to be reduced by 30%? - Cone and cube
About what percentage has cone with base radius r larger volume than a same high cube with square base with edge length r? - A trip to the Dry Peak
Calculate what percentage of the trip from Strečno to peak Suchý (Dry Peak) is longer than the descent back. The team of tourists (Palo, Peter, and Andrew) 's rise took 4:11 and descent 3:51. - Aquarium II
Calculate how much glass is needed to build a rectangular aquarium with a base of 65 cm × 52 cm and a height of 74 cm, assuming 2% waste. The aquarium has no top. - Black building
Jozef built a building with a rectangular footprint of 3.9 m × 6.7 m. Calculate by what percentage the building exceeds the legal limit of 25 m² for a small building. A building constructed without planning permission is called an illegal building. Also c - Event probability
The probability of event N in 5 independent experiments is 0.4. What is the probability that the event N occurs in one experiment (chance is the same)? - Shooter
The probability that a skilled shooter hits the centre of target zone I is 0.13. The probability of hitting inner circle II is 0.58. What is the probability that the shooter hits zone I or zone II? - Wood in the forest
The amount of wood in the forest was estimated at 35000 m³. How much wood will be in the forest after 4 years if the annual growth of wood is 3% each year and logging 700 m³ each year? - Demographics
The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase in population? - Compound interest
Calculate the time it takes for a bank deposit earning 2.6% p.a. interest to double. - Loans, loan ...
Short-term non-bank loans in Slovakia are considered very unfavourable. Borrowers often end up in a debt spiral, taking out increasingly burdensome loans to repay earlier ones. Calculate how many 7-year loans of €1400 at 23% APR a person can repay if thei - Iron
Iron ore contains 61% iron. How much iron ore is needed to produce 29 tons of iron? - Descent of road
A road sign shows a gradient of 10.9%. Calculate the angle of inclination of the slope. - Barrel of oil
The barrel of oil weighs 283 kg. When it molded 26% oil, it weighed 216 kg. What is the mass of the empty barrel? - Extreme temperatures
The USA hit an extreme heat wave. Calculate the percentage of the air temperature change from normal summer temperature 25 °C to 38 °C. - Bulbs
The probability that the bulb can operate 4000 hours is 0.3. What is the probability that exactly one of the eight bulbs can operate 4000 hours? - Magnification of the square
If the side of a square is increased, the area increases by 57%. By what percentage was the side increased? - Promile
Calculate the 17.6 ‰ of 353. - Slovakia banks
It is an unwritten rule that the largest banks in Slovakia (by number of clients and balance sheet size) offer the worst and most expensive services. Many customers nevertheless remain loyal to the big three: SLSP, VUB, and Tatra banka. Calculate how many - Tesco Clubcard
František got quarterly billing vouchers for Tesco ClubCard, taking goods worth 6.5 Eur. Calculate the average monthly amount Tesco stores bought goods. Tesco ClubCard works for every Euro spent; you get one ClubCard point, which Tesco will convert to one
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