Percentages practice problems - page 86 of 100
Percentages are a way to express a number as a fraction of 100. They are often used to express a proportion or rate, such as a percentage of total sales or a percentage increase or decrease in a value. For example, if a product sells 25 out of 100 units, the percentage of units sold is 25%, which can also be written as 0.25 or 25/100.Percentage points, also known as percentage point change or "pp" for short, is the difference between two percentages. It is often used to express the change in a variable over time or between two groups. For example, if a company's profits increased from 10% to 20% over a year, the percentage point change would be 10 percentage points (20% - 10% = 10%).
Number of problems found: 1998
- Competitors 2417
20% of the people lost in the races, and the total number was 100 competitors. How many competitors lost? - Reduce of the volume
Calculate how many % reduce the volume of the cube is reduced the length of each edge by 10%. - Savings 2411
How many euros does Karol save if 7% of his savings is 70 euros? - Seeds 2
How many seeds germinated from 1000 pcs when 23% had no emergence?
- Sum 10
What is the probability that two dice thrown twice in a row will result in the sum of 10? - Throw
We throw two times with two dice. What is the probability that the first roll will fall more than the sum of 9 and the second throw has a sum of 3 or does not have the sum of 4? - Probability 2386
We throw a die seven times. What is the probability that: a) the first, second, and third times fall six and not in all the others, b) 5 does not fall four times in a row, and yes, in the last 3 hours? - Determine 2385
Determine x if 98% of x equals 196. - Rectangle
The width of the rectangle is 65% of its length. The perimeter of the rectangle is 132 cm. Determine the dimensions of the rectangle.
- Addends
Number 118 divide into two addends, so the first addend is 69 greater than 75% of the second addend. - Probability - tickets
What is the probability when you have 25 tickets in 5000 that you do not win the first (one) prize? - School library
The school library contains 6300 books. With this constitutes 7% of professional books for teachers, 18% of interest books and encyclopedias for pupils, and the rest of the fairy tales. How much are which books? - Backpack
A large backpack costs CZK 1352. Little is 35% cheaper. How much do we pay for five large and two small backpacks? - Metal box
How much metal do we need to produce in a box with dimensions of 5 dm, 30 cm, and a height of 1 m? Add 12% of the waste and fold.
- Joshka
Joshua had € 15. Mama took him 15%. How many had left? - Average mark
Calculate the average mark in English if a student got a couple of 3's, 20% less two than 3, and 50% more 1's than the 2's. - Lathe
Calculate the percentage of waste if the cube with 53 cm long edge is lathed to the cylinder with a maximum volume. - Forces
Determine the resultant of two perpendicular forces F1 = 560 N and the second force 25% smaller. - Property
The length of the rectangle-shaped property is 8 meters, less than three times the width. If we increase the width by 5% of a length and length reduce by 14% of the width, it will increase the property perimeter by 13 meters. How much will the property co
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