# Iron

Iron ore contains 57% iron. How much ore is needed to produce 20 tons of iron?

Result

x =  35.1 t

#### Solution:

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

Be the first to comment!

## Next similar examples:

1. 100 %
How much is 100%, if 17 % is 1169?
2. Energy saving
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 thre
3. Conference
148 is the total number of employees. The conference was attended by 22 employees. How much is it in percent?
4. New refrigerator
New refrigerator sells for 1024 USD, Monday will be 25% discount. How much USD will save, and what will be the price?
5. TVs
Production of television sets increased from 3,500 units to 4,200 units. Calculate the percentage of production increase.
6. 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?
7. Seeds 2
How many seeds germinated from 1000 pcs, when 23% no emergence?
8. The percentages in practice
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 fro
9. Percents - easy
How many percent is 432 out of 434?
10. Number
What number is 20 % smaller than the number 198?
11. Base, percents, value
Base is 344084 which is 100 %. How many percent is 384177?