Number of problems found: 726
- The Chemistry test
The Chemistry test contained 8 questions, each with 3 points. Peter scored 21 points. How many percent did Peter write a test?
- The town
The town population is 56000. It is decreasing by 2% every year. What will be the population of the town after 13 years?
- 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 where there are 30 participants?
Workers works 5 days a week and has 28 days of vacation a year. Calculate how many days is out of work and express it as a percentage. Consider that a year has 52 weeks.
- The golf
The golf ball with a diameter of 43 mm is packed in a cube-shaped box. What percentage of the box volume is made up of a ball?
During auto-tuning, the TV searched for 25 channels, four of which were music. The channels are stored in the TV's memory in random order. Express the percentage of the event that the music channel will be saved first.
How much percent has changed (reduced) area of pipe cross-section, if circular shape changed to square with same perimeter?
- Inscribed sphere
How many percent of the cube volume takes the sphere inscribed into it?
The children's competition was attended by 63 girls, which is 30% of all children's participants. How many children attended this competition?
Potatoes contain 78.6% starch. How many potatoes need to obtain 27 kg of starch?
Three employees earned a total of € 469 for repairing the equipment. They split so that the first got 20% more than the second, and the third 15% more than the second. How many euros did everyone get?
What percentage vinegar we get if we mix 1 if dm³ eight percent vinegar with 1.5 dm³ six percent vinegar?
- Cake ingredients
The yeast cake contains milk, yeast, sugar, and flour in a ratio of 20: 4: 1: 15. What percentage of flour is in yeast?
- In the classroom
There are 30 boys and a few girls in the class. In the six months, 28 boys and all girls benefited, which was 95% of all pupils. How many pupils are there in the classroom?
- Price inflation
This year the average wage grew by 4.5%. Prices rose by 2%. How much did the real wage increase in the given year?
- Cube edges
If the edge length of the cube increases by 50%, how does the volume of this cube increase?
- Sales off
Calculate what was the original price of the good, if the price after discount 25% and the subsequent rise of 20% is 400 USD.
- Typing course
Before taking a typing course, Terrence could type 39 words per minute. By the end of the course, he was able to type 68 words per minute. Find the percent increase.
A camera has a listed price of $751.98 before tax. If the sales tax rate is 9.25%, find the total cost of the camera with sales tax included.
The farmer farming 293 ha of arable land and the remaining 20% are meadows and pastures. How much land farmer owns?
Our percentage calculator will help you quickly calculate various typical tasks with percentages.