# Ratio + rational numbers - math problems

#### Number of problems found: 37

• Ratio Increase in the ratio 20:4 number 18.5.
• Ratio v2 Decrease in the ratio 12:16 number 13.2.
• Ratio - proportion Reduce the number 16 in proportion 3:2 5:4 11:8
• One sixth How many sixths are two thirds?
• Percentages and numbers How many percent is number 69 smaller than number 276?
• Bureaucracy The office was attended by 23 people. 9 of them completed the questionnaire. What is the percentage of all people?
• Efficiency A certain device consumes 28 kW and delivers 14 kW. Find its efficiency.
• Discount Product has been discounted twice by 19%. What is the total discount given?
• Book Calculate the thickness of the page of the collection of examples from mathematics, where 4.87 cm thick and has 451 pages.
• Three co-owners The three co-owners of building company have earnings from a contract portioned in the ratio of 3:6:7. Each of them received the amount in whole USD. One of them on contract earned 86450 USD. What was the total earnings this order?
• Server Calculate how many average minutes a year is a webserver is unavailable, the availability is 99.99%.
• Expansion If one side of the rectangle is larger 4-times and second 2-times, what percentage increases the area of rectangle?
• School trip School trip cost 247.2 Eur for one class (24 students). How much would cost a trip for two classes? (both classes together have 53 students)
• Bonus The gross wage was 1323 USD including 25% bonus. How many USD were bonuses?
• Arble bag A marble bag sold by Rachel's Marble Company contains 5 orange marbles for every 6 green marbles. If a bag has 35 orange marbles, how many green marbles does it contain?
• VAT John paid 1000 Euros in store for purchase. Calculate value added tax (VAT), which paid in purchase, if the VAT rate is 20%.
• Tape Video is 153% more expensive than tape recorder. How many percent is tape recorder less expensive than video?
• Tare Gross weight of shipment is 6927 kg and its tare is 7%. Calculate the net weight of the shipment.
• Daily average Calculate the average temperature during the day, when 15 hours were 20 °C and 9 hours was 13 °C.
• 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.

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