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

#### Number of problems found: 84

• 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?
• Cube into sphere The cube has brushed a sphere as large as possible. Determine how much percent was the waste.
• The price The price of the land increased by 17%. What was the original price of the land if it now costs 46800 €?
• Find the Find the number x, which if it increases by 2, then its square increases by 21 percent.
• Lions If 8 lions is 40% how many would 75% be?
• 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?

Do you have an interesting mathematical word problem that you can't solve it? Submit a math problem, and we can try to solve it.

We will send a solution to your e-mail address. Solved examples are also published here. Please enter the e-mail correctly and check whether you don't have a full mailbox.

Please do not submit problems from current active competitions such as Mathematical Olympiad, correspondence seminars etc...

Our percentage calculator will help you quickly calculate various typical tasks with percentages. Percentages Problems. Expression of a variable from the formula - math problems.