# 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 three inventions together?

Result

p =  43.9 %

#### 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. New refrigerator
New refrigerator sells for 1024 USD, Monday will be 25% discount. How much USD will save, and what will be the price?
2. Gloves
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?
3. Iron
Iron ore contains 57% iron. How much ore is needed to produce 20 tons of iron?
4. 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?
5. Seeds 2
How many seeds germinated from 1000 pcs, when 23% no emergence?
6. Percents - easy
How many percent is 432 out of 434?
7. Number
What number is 20 % smaller than the number 198?
8. Apples 2
James has 13 apples. He has 30 percent more apples than Sam. How many apples has Sam?
9. Conference
148 is the total number of employees. The conference was attended by 22 employees. How much is it in percent?
10. 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