# Percentages + expression of a variable from the formula - math problems

#### Number of problems found: 77

• Demographics The population grew in the city in 10 years from 30000 to 34000. What is the average annual percentage increase of population?
• Finding the base Find the unknown base of percent: 12.5 percent of what = 16?
• What is What is the annual percentage increase in the city when the population has tripled in 20 years?
• Together m+w Women 30%. Men are 360 more. How many are together?
• Price increase A 20 percent price increase meant a 90-crown raise. How many cost a product after?
• Decibel By what percentage does the sound intensity increase if the sound intensity level increases by 1 dB?
• Cube edges If the edge length of the cube increases by 50%, how does the volume of this cube increase?
• Sales off The price has decreased by 20%. How many percents do I have to raise the new price to be the same as before the cut?
• The price The price of the land increased by 17%. What was the original price of the land if it now costs 46800 €?
• Cube into sphere The cube has brushed a sphere as large as possible. Determine how much percent was the waste.
• Raspberries Dano had 20 raspberries. John had 90% more raspberries than Dano. Determine how many raspberries have Dano and Juraj together.
• Growth of wood The annual growth of wood in the forest is estimated at 2%. In how many years will make the forest volume double?
• Slow saving in banks How long will it take to save € 9,000 by depositing € 200 at the beginning of each year at 2% interest?
• Vacation Tomas spent 60% of his savings for his weekly vacation. He was 32 € left. How many euros did he have before vacation?
• Meat loses Meat loses 18% of its weight by smoking. How much raw meat butcher used to manufacture 35 kilos of smoked?
• Cuboid enlargement By how many percent increases the volume of cuboid if its every dimension increases by 30%?
• Former price The price of an article is cut by 10%, to restore it to the former value, by what percent the new price must be increased?
• Calf The weight of the calf meat obtained is 65% of the total weight of live calves. What was the weight of a calf from which 285 kg of meat was obtained?
• Sale off Product cost 95 euros before sale off. After sale off cost 74 euros and 10 cents. About what percentage of produt became cheaper?
• Bike cost The father gave his son € 100 to buy a bicycle, which was 40% of the total amount of the bicycle. How much did the bike cost?

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