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

Number of problems found: 84

  • Demographics
    population 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
    percent Find the unknown base of percent: 12.5 percent of what = 16?
  • What is
    exp_growth2 What is the annual percentage increase in the city when the population has tripled in 20 years?
  • Together m+w
    workers Women 30%. Men are 360 more. How many are together?
  • Price increase
    sleva A 20 percent price increase meant a 90-crown raise. How many cost a product after?
  • Decibel
    tv By what percentage does the sound intensity increase if the sound intensity level increases by 1 dB?
  • Cube edges
    cubes3.png If the edge length of the cube increases by 50%, how does the volume of this cube increase?
  • Sales off
    sale 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
    cube_sphere_in The cube has brushed a sphere as large as possible. Determine how much percent was the waste.
  • The price
    map The price of the land increased by 17%. What was the original price of the land if it now costs 46800 €?
  • Find the
    eq222 Find the number x, which if it increases by 2, then its square increases by 21 percent.
  • Lions
    lion If 8 lions is 40% how many would 75% be?
  • Raspberries
    maliny Dano had 20 raspberries. John had 90% more raspberries than Dano. Determine how many raspberries have Dano and Juraj together.
  • Growth of wood
    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
    penize How long will it take to save € 9,000 by depositing € 200 at the beginning of each year at 2% interest?
  • Vacation
    eura Tomas spent 60% of his savings for his weekly vacation. He was 32 € left. How many euros did he have before vacation?
  • Meat loses
    maso Meat loses 18% of its weight by smoking. How much raw meat butcher used to manufacture 35 kilos of smoked?
  • Cuboid enlargement
    cubes By how many percent increases the volume of cuboid if its every dimension increases by 30%?
  • Former price
    books 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
    tela 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?

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