Percentages - practice for 14 year olds - page 21 of 61
Number of problems found: 1210
- Kilometers 46161
Tourists missed 15% of the entire route on the first day and a fifth of the rest on the second day. They still had 34km to go. How many kilometers did they travel the next day? - Performance 45861
The electric motor with a power input of 25 kW works with an efficiency of 80 percent. He will do the work in 6 hours. What is the performance, and what part of the work is the loss? - Students 45261
There are 200 pupils in the class, 40% of whom cannot swim. How many students can swim? - Ramon
Ramon earns 1,810 each month and pays a 53.20 bill on electricity. To the nearest tenth of a percent, what percent of Ramon's earnings are spent on electricity each month?
- Fertilizer
I have 4 liters of 10% fertilizer. How much water do I need to add to have a 2% solution? - Initially 44521
The dress initially cost € 30 and was 20% cheaper on sale. What is the new price of the dress? The latest price is: - Grams 44441
How many grams of 70% and 45% acid must be mixed to form 300 grams of 60% acid? - Calculate 44351
Calculate how many grams of iodine and ethanol are needed to prepare 200 grams of 6% iodine in ethanol solution. - Beginners 44251
Of the 150 children on the ski course, 40 were beginners. How much is a penny?
- Hectares 44241
Farmers have sown corn for 45ha, which is 15% of the total area of their farm. How many hectares of fields do they farm? - Height and base
An isosceles triangle has an area of 168 cm², and its added height and base are 370 cm. What are the measurements of its height and base? - Dimensions 44081
In the form of a pyramid on the house with a square floor plan, the roof has dimensions of 12 x 12 m, with a height of 2 m at the highest point. How much roofing do I need to buy? Count on a 10% reserve. - Pyramidal 44061
A pyramidal candle with a square base has a side edge of s = 12 cm and a base edge of 4 cm. How much wax will we need to make it, and how long is the wick if it is 5% bigger than its height? - The roof
The tower's roof has the shape of a regular quadrangular pyramid, the base edge of which is 11 m long, and the side wall of the animal with the base at an angle of 57°. Calculate how much roofing we need to cover the entire roof if we count on 15% waste.
- Inclination 43321
What percentage of the gradient should be indicated on the mark if the angle of inclination of the road is 6 ° 25'? - Calculation 43211
The roof is shaped like a hemisphere with a diameter of 8 m. Calculate how much m² of roofing is needed to cover the entire top if we count 15% for waste and residues and round the result to tenths of m². Use the constant pi rounded to two decimal places - Mr. Brown
Mr. Brown invested 15,000 euros in the bank for an annual term deposit. After the first year, he gained 600 euros. What was the annual interest rate of his deposit? - Megapizza
Mega pizza will be divided among 100 people. First gets 1%, 2nd 2% of the remainder, 3rd 3% of the remainder, etc. Last 100th 100% of the remainder. Which person got the biggest portion? - 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?
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Our percentage calculator will help you quickly calculate various typical tasks with percentages. Percentages practice problems. Maths practice for 14 year olds.