Percentages + rational numbers - math problems

1. Bonus Gross wage was 527 EUR including 16% bonus. How many EUR were bonuses?
2. River Calculate how many promiles river Dunaj average falls, if on section long 957 km flowing water from 1454 m AMSL to 101 m AMSL.
3. Server Calculate how many average minutes a year is the web server is unavailable, the availability is 99.99%.
4. Discount Ladies sweater was twice discounted. First by 11%, then by 11% of the new price. Its final price was 100 €. Determine the original price of sweater.
5. Alcohol How many 55% alcohol we need to pour into 14 liters 75% alcohol to get p3% of the alcohol? How many 65% alcohol we get?
6. Percentages above 100% What is 122% of 185? What is the meaning of percentages above 100%?
7. Tare Gross weight of shipment is 5188 kg and its tare is 5.6%. Calculate the net weight of the shipment.
8. Expansion If one side of the rectangle is larger 4-times and second 2-times, what percentage increases the area of rectangle?
9. Sea water Mixing 34 kg of sea water with 34 kg rainwater is created water containing 3.4% salt. How many percent sea water contains salt?
10. VAT John paid 100 Euros in store for purchase. Calculate value added tax (VAT), which paid in purchase, if the VAT rate is 20%.
11. Negative percentage In 2004, the company had a loss of 40900 Euros. Two years later he was already in profit 48900 Eur. Calculate what percentage of the company increased profits in this two years.
12. Acid The barrel is 199 litres of 38% acid. How many percent acid occurs when 61 litres revoke and replace it with the same amount of water?
13. Tape Video is 153% more expensive than tape recorder. How many percent is tape recorder less expensive than video?
14. Discount Product has been discounted twice by 19%. What is the total discount given?
15. Two doctors Doctor A will determine the correct diagnosis with a probability 93% and doctor B with a probability 79%. Calculate probability of correct diagnosis if patient is diagnosed by both doctors.
16. Peroxide How much distilled water (in liters) must pharmacists pour into 300 ml of 23.6% solution of hydrogen peroxide to get 2.7% solution to gargle?
17. Discounts on rail (ZSSK) The railway company ZSSK offers a discount of 15% (REGIONAL) for 5 Eur/year. Calculate the real discount rate as a percentage, where passengers will travel 19 Eur per week.
18. Company After increasing the number of employees by 15% company has 253 employees. How many employees take?
19. Bureaucracy The office was attended by 23 people. 9 of them completed the questionnaire. What is the percentage of all people?
20. Four pupils Four pupils divided \$ 1485 so that the second received 50% less than the first, the third 1/2 less than a fourth and fourth \$ 154 less than the first. How much money had each of them?

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