Percentages practice problems - page 81 of 112
Number of problems found: 2224
- Unknown number
If we increase the unknown number by 4%, we get 780. Determine the unknown number. - Number increase The unknown number was first increased by 17%, and the result was the number A. The second time, the teacher reduced the original number by 8%, resulting in number B. The difference between the numbers A and B is 50. Determine the unknown number.
- Sale off 2
A pair of blue jeans went on sale. After a 30% reduction, the pants cost $35. How much did the jeans cost before the price reduction? - Three reds
What is the probability that all three of the seven cards will be red if three cards are drawn? - Bank account
Petr succumbed to a bank's tempting offer, opened an account, and deposited CZK 1,051 into it. The account bore interest at 1.4%, credited once a year. The fee for maintaining this account was only CZK 140 per year. After seven years, he enjoyed how his d - Savings interest
It was 1975, and Petr deposited the entire cash of 10,900.40 Euros in a savings account with 4% interest, credited monthly. He did not add anything to the book, and in exactly 15 years, he withdrew the entire amount in cash. How much did you choose? - Smoking survival
According to the International Health Federation, chickens shorten their lives by an average of 16 years. What percentage of chicken currencies survive if the average age is 76? - Event comparison
Compare the odds of pairs of events. A) Slovakia will be the world champion in ice hockey 2 times in a row. B) You will write all the papers this year with at least a double. C) In two years, humans will be on Mars. D) Someone in your class will write all - Calculate the pool
Calculate how many square meters are needed to line the pool 6 meters long, 4 meters wide, and 1.5 meters deep. Add 10% to waste. - Rectangle sides
The rectangle is 20 percent longer than the length. Its circumference is 22 cm. What are the sides of a rectangle? - Roof 7
The roof is a regular quadrangular pyramid with a base edge of 12 m, and a height of 4 m. How many percent is folds and waste if in construction was consumed 181.4m² of the plate was? - BTC bubble
One of the world's experts in bubbles -- Prof. Robert Shiller, a Yale economist -- said Bitcoin "was an amazing example of a bubble" back in 2014. If you exchanged fiat US dollars $100 to BTC in 2010, now in 2017, have a value of 72.9 million dollars. Fin - Three shapes
1/5 of a circle is shaded. The area's ratio of a square and the sum of a| rectangle and the circle is 1:2. 60% of the square is shaded, and 1/3 of the rectangle is shaded. What is the ratio of the area of the circle to that of the rectangle? - Dividing money I have CZK 6,155, and I need to divide it as a percentage into two outstanding amounts: CZK 12,000 and CZK 35,000. How much money will I send to each of them? Thank you for your answer.
- Martian antennae
Each Martian has 1,2,3 feeler on his head 1 antenna: 2% of the population 2 antennae: 97% of the population 3 antennae: 1% of the population What percentage of Martians have more antennae than the population average? - Railway Tunnel
The largest tunnel in the Slovak Republic on the Banská Bystrica-Diviaky route measures 4,698 m, which was only 8.7% of the length of the longest railway tunnel at the time in the world, the Seikan in Japan. Calculate the length of this tunnel - Monthly revenue The private store earned CZK 28,150 per week, representing 22% of monthly sales. Calculate the average monthly revenue.
- Diameters of circles
How many percent of the area of a larger circle is a smaller circle if the smaller circle has a diameter of 120 mm and a larger one has a diameter of 300 mm? - Cutting circles
From the square 1 m sides, we have to cut the circles with a radius of 10 cm. How many discs will we cut, and how many percent will be wasted? - Fruit sales
The seller sold 40% of the fruit on the first day, 2/3 of the rest on the second day, and the remaining 20 kg on the third day. How much fruit did he sell in those three days?
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