Percentages - practice for 12 year olds
Number of problems found: 286
- Sales tax 2
Item cost $430 before tax. Sales tax is $17.20. Find the sales tax rate and percentage. - Paycheck
Alex automatically deposited 70% of her weekly paycheck into a savings account. This week, $35 is deposited. Alex wants to know the total amount of her paycheck this week. - Black to brown ratio
In a box, there are 20 pairs of socks, of which 65% are black and the rest are brown. What's the ratio of black and brown socks? - Two sides 2
Two sides of a triangle are 12 and 15, and the perimeter is 40. Find the other side.
- A merchant 2
A merchant bought some items for P175.00 a dozen less 20% and sold them at a profit of 35% of the selling price. What was the selling price of one item? - Cost and profit
Find the cost of goods that sold for P800.00 and which profit of 25% was made on cost. - Population
If 1/2 of the students are white, 1/8 of the students are latino, and 3/8 of the students are black. What percent are other? - Tree's virus
An arborist examined trees in an orchard to see if they were infected with a virus. 42 out of 75 trees were infected with the virus. What percentage of the trees were infected? Write your answer using a percent sign (%). - Successful 83167
Eighth-grade test results: 8D =? 8B = 47 8A = 44 8E = 37 8C = 28 Class 8A achieved exactly the average result. How many points did the winning class 8D get? By what % is class 8B more successful than class 8C?
- Solution 83019
Kitchen vinegar is an 8% solution of acetic acid in water. How many liters of acetic acid are needed to produce 275 liters of vinegar? - Accumulator 82755
The battery capacity is 50 Ah. With a current of 5A, we charge the accumulator to 100% capacity in 10 hours. To what percentage of capacity can we charge the accumulator with a current of 2A in 15 hours? - Parliamentary 82743
4/5 MPs took part in the autumn parliamentary meeting. 80% of those present voted for the proposed program. According to the rules, the program can only be approved if at least 60% of all deputies vote for it. Was the program approved or not? - Allowances 82413
The teacher decided to sew covers for the eight-seat blocks in the school library. All cubes are cube-shaped with an edge 40 cm long. How many m² of fabric will the teacher need in total if the blocks are not lined from the bottom, and 5% must be added fo - Quadrilateral 81975
The lime pit has the shape of a quadrilateral prism with dimensions of 2m, 1.8m, and 1.5m Calculate the pile volume from the excavated soil, which, due to fluffing, is 20% larger than the volume of the pit.
- Applies 81948
From a rented house worth 1.25 million CZK, the owner will receive an annual rent of 6.5% of the house price. 20% tax applies to the rent. How much CZK will the owner have from the rent per year? - Percentage 81297
There are 13,000 spectators in the stadium. Five thousand eight hundred fifty sat. What percentage was seated? - Percentage 81296
Milan saved 120 euros per year, and Eduard saved 150 euros. By what percentage did Eduard save more? - Percentages 81226
There are 32 students in the class; 17 are awarded, 14 passed, and 1 failed. Determine the number percentages of students with honors, successful and not successful students - Probability 81117
Martin forgot the 4-digit PIN, and he remembered the first three numbers. The fourth number is odd. What is the probability in % that he will be able to determine the PIN? He has only one attempt.
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