Class

In 7.C clss are 10 girls and 20 boys. Yesterday was missing 20% of girls and 50% boys. What percentage of students missing?

Result

x =  40 %

Solution:

x=100⋅ (0.20⋅ 10+0.50⋅ 20)/30=40=40%x = 100 \cdot \ (0.20 \cdot \ 10+0.50 \cdot \ 20)/30 = 40 = 40 \%

Try another example


Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!





Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments:
1st comment
Be the first to comment!
avatar




Tips to related online calculators
Our percentage calculator will help you quickly calculate various typical tasks with percentages.

Following knowledge from mathematics are needed to solve this word math problem:

Next similar math problems:

  1. Class
    children_2 In a class are 32 pupils. Of these are 8 boys. What percentage of girls are in the class?
  2. Human buying irrationality
    athlonxp I longer watch processors for Socket A on ebay, Athlon XP 1.86GHz with a PR rating of 2500+ costs $7 and Athlon XP 2.16Ghz with a PR rating of 3000+ currently cost $16. Calculate: About what percentage of the Athlon XP 2.16Ghz is powerful than Athlon X
  3. Number
    percent What number is 20 % smaller than the number 198?
  4. Gloves
    rukavice I have a box with two hundred pieces of gloves in total, split into ten parcels of twenty pieces, and I sell three parcels. What percent of the total amount I sold?
  5. New refrigerator
    lednice New refrigerator sells for 1024 USD, Monday will be 25% discount. How much USD will save, and what will be the price?
  6. TVs
    tv Production of television sets increased from 3,500 units to 4,200 units. Calculate the percentage of production increase.
  7. Seeds 2
    seed How many seeds germinated from 1000 pcs, when 23% no emergence?
  8. Iron
    250px-Iron_electrolytic_and_1cm3_cube Iron ore contains 57% iron. How much ore is needed to produce 20 tons of iron?
  9. Base, percents, value
    percent_1 Base is 344084 which is 100 %. How many percent is 384177?
  10. 100 %
    elephant How much is 100%, if 17 % is 1169?
  11. Sales off
    up_to_30 Goods is worth € 70 and the price of goods fell two weeks in a row by 10%. How many % decreased overall?
  12. Energy saving
    energy_star They were released three different, independent inventions saving 12%, 15% and 25% energy. Some considered that while the use of these inventions, the total savings will be 12% + 15% + 25% = 52%. Is this true? How much percent of energy will save all thr
  13. Apples 2
    jablko James has 13 apples. He has 30 percent more apples than Sam. How many apples has Sam?
  14. Conference
    conference 148 is the total number of employees. The conference was attended by 22 employees. How much is it in percent?
  15. The percentages in practice
    plodina If every tenth apple on the tree is rotten it can be expressed by percentages: 10% of the apples on the tree is rotten. Tell percent using the following information: a. in June rained 6 days b, increase worker pay 500 euros to 50 euros c, grabbed 21 fr
  16. Percents - easy
    percents_5 How many percent is 432 out of 434?
  17. Washing machine
    washing_masine The price of washing machine was decreased by 21% and then by 55 € due small sales. After two price decreases cost € 343. How much was originally cost?