Percentages + ratio - math problems
Number of problems found: 71
- Percentages and numbers
How many percent is number 69 smaller than number 276?
- Red diplomas
He numbers of students with honors in 2013 and 2014 are in ratio 40:49. How big is the year-on-year percentage increase?
- Cone in cylinder
The cylinder is inscribed cone. Determine the ratio of the volume of cone and cylinder. The ratio express as a decimal number and as percentage.
- Cone in cube
The cube is inscribed cone. Determine the ratio of the volume of cone and cube. The ratio express as a decimal number and as percentage.
- Cake ingredients
The yeast cake contains milk, yeast, sugar, and flour in a ratio of 20: 4: 1: 15. What percentage of flour is in yeast?
What is better for people (employees)? ?
- Gasoline-oil ratio
The manufacturer of a scooter engine recommends a gasoline-oil fuel mixture ratio of 15 to 1. In a particular garage, we can buy pure gasoline and a gasoline-oil mixture, 75% gasoline. How much gasoline and gasoline-oil mix do we need to make 8.0 L of fue
- Percentage 10
52 shorts and missed 13. Calculate percentage
- Three shapes
1/5 of a circle is shaded. The ratio of area if square to the sum of area of rectangle and that of the circle is 1:2. 60% of the square is shaded and 1/3 of the rectangle is shaded. What is the ratio of the area of circle to that of the rectangle?
- Rectangle area
The length of a rectangle of x units is increased by 10% and its width of y units is increased by 15%. What is the ratio of the area of the old rectangle to the area if the new rectangle?
Jarek bought new trousers, but the trousers were too long. Their length was in the ratio 5: 8 to Jarek height. Mother his trousers cut by 4 cm, thus the original ratio decreased by 4%. Determine Jarek's high.
What is the annual interest rate on your account if we put 32790 and after 176 days received 33939.2?
The office was attended by 23 people. 9 of them completed the questionnaire. What is the percentage of all people?
There are 32 pupils in the classroom, and girls are two-thirds more than boys. a) How many percents are more girls than boys? Round the result to a whole percentage. b) How many are boys in the class? c) Find the ratio of boys and girls in the class. Writ
The speedometer of a car reads 66 km/h. It's accurate to within 4.1% What is the maximum possible error?
- Volatile percents
Kent is working as a forex trader. Suffered a loss of 65.8 percent. Calculate what percentage must now earn to lift from loss?
A certain device consumes 28 kW and delivers 14 kW. Find its efficiency.
- Altitude difference
What a climb in per mille of the hill long 4 km and the altitude difference is 6 meters?
How much percent has changed (reduced) area of pipe cross-section, if circular shape changed to square with same perimeter?
Potatoes contain 78.6% starch. How many potatoes need to obtain 27 kg of starch?
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