Percentages + expression of a variable from the formula - practice problems - page 2 of 11
Number of problems found: 214
- Discount 82044
The purchase of a sweater after a 28% discount was CZK 360. How much was the shirt before the discount? - Determine 5192
Determine the numbers x and y so that half of the number x is 30% of the number and 60% of y is 90. - The number 72
The number 72 increased by 25%. By how much % will you have to reduce the number you created to get the number 72 again? - Together m+w
Women are 30%. Men are 360 more. How many are together? - Unknown variable
Find the number x, which if it increases by 2, then its square increases by 21 percent. - Raspberries
Dano had 20 raspberries. John had 90% more raspberries than Dano. Find how many raspberries have Dano and Juraj together. - Multiplied 7208
Which fraction number must be multiplied by 40 to get a 6% smaller number? - Numbers 6101
Fifty percent of the number x equals sixty percent of the number y. What is the ratio of the numbers x and y? - Decibel
What percentage of sound intensity increases if the sound intensity level increases by 1 dB? - Cube into sphere
The cube has brushed a sphere as large as possible. Determine how much percent the waste was. - VAT on books
The cost of a book in the store is 12.5 euros. How many euros is the VAT of this book? VAT is 10%. - Positive number z
The positive number z is 10% greater than the number y. How many percent is y smaller than z? Report the result rounded to one decimal place. - Ethnicity
The share of ethnicity XY is 26%, which is 1/9 more than in the prewar period. What was the share of that ethnicity in the prewar period? - Cube wall
The surface of the first cube wall is 64 m². The second cube area is 40% of the surface of the first cube. Find the length of the edge of the second cube (x). - Isosceles right triangle
The area of an isosceles right triangle is 18 dm². Calculate the length of its base. - Increased 8350
Write with: (a) the number x increased by half (b) the number y reduced by 20 c) a quarter of the sum of the numbers x and y (d) a figure 20% greater than e) 40% of number x - The ratio 4
The ratio of two numbers is 5:4. If 40% of the first number is 12, what will be 50% of the second number? - Cargo
The car with cargo weighs 7610 kg. The car's weight is 23% of the car's total weight and cargo. How heavy is the cargo? - Solution 38411
Prepare 250g of a 30% solution of hydrogen peroxide in water. - Solution 38391
Prepare 100g of a 15% blue rock solution.
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