Natural numbers + percentages - practice problems
Number of problems found: 60
- Children
Of the estimated 2 billion children living in the developing world, approximately 400 million do not have access to safe drinking water. Approximately what percentage of children in developing countries do not have safe water to drink? - Say we
Say we have 70 voting delegates, and we need a 2/3 vote. What would that number be? It is also the same as above, but it converts to percentages in this virtual world. What would the % number of positive votes be? - Four pupils
Four pupils divided euro 634 so that the second received 30% less than the first, the third 1/5 less than a fourth, and the fourth euro 95 less than the first. How much money had each of them? - In the 14
In the survey, the barangay had a certain number of families, and 60% of them identified as belonging to the marginalized sector's poor if the total families were 150. How many families belong to the poor sector?
- Divisibility
Is the number 186317 exactly divisible by 7? (the result is the integer, and/or remainder is zero) - Secondary 20523
In 2015, there were 1140000 primary and secondary school pupils in the Czech Republic, 15.6% of whom attended private schools. How many students attended private schools? - Paulownia
Seed germination is 80%. Of the sprouted plants, 8% subsequently die. How many plants does a gardener grow from 1,500 seeds? - Increased 64324
The number of books in the city library increased by 0.2% in 2008 and 0.6% in 2009. At the same time, the total number of books remained less than 300,000. How many books were added to the city library in 2009? - Population 83002
Calculate how many people were born in the state; if the total population was 10,000,000 this year, the natural increase was 2%, and 5,000 people died.
- 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? - Participate 7616
Two hundred fifty students were to participate in the discussion on the dangers of drugs. 8% of them did not participate in the debate. How many students were in the discussion? - Successful 6077
The natural history test contained 21 questions. The teacher evaluated each question by two points. Milan wrote a test for 39 points. At what percentage was Milan successful? - Fish population
The number of fish in a lake decreased by 10% during one year. Last year there were 500 fish in the lake. What is the fish population this year? - Already 82989
The book has 1200 pages, of which Róza has already read 60%. How many pages has Rose not read so far?
- Students 45261
There are 200 pupils in the class, 40% of whom cannot swim. How many students can swim? - Toy cars
Pavel has a collection of toy cars. He wanted to regroup them. But in the division in groups of three, four, six, and eight, he was always one left. Only when he formed groups of seven he divided everyone. How many toy cars have in the collection? - Volunteers 81981
Volunteers planted saplings in the forest nursery; spruces made up 55% of all saplings; one-third were edible, and the rest were young pines. How many saplings did they plant if the number of saplings was greater than 1060 and less than 1090? - Initially 35123
Five hundred ninety pieces of clothing were to be sewn in the two branches of the tailor's workshop. However, 30% more were sewn in the first workshop and 10% more in the second. They sewed a total of 703 pieces. How many products were initially supposed - Capacity 82231
There were 60 people in the stadium, which was 30% of capacity. How many people can fit in the stadium?
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