Percentages practice problems - page 3 of 99
Percentages are a way to express a number as a fraction of 100. They are often used to express a proportion or rate, such as a percentage of total sales or a percentage increase or decrease in a value. For example, if a product sells 25 out of 100 units, the percentage of units sold is 25%, which can also be written as 0.25 or 25/100.Percentage points, also known as percentage point change or "pp" for short, is the difference between two percentages. It is often used to express the change in a variable over time or between two groups. For example, if a company's profits increased from 10% to 20% over a year, the percentage point change would be 10 percentage points (20% - 10% = 10%).
Number of problems found: 1977
- Years 3
How long will it take for a given sum of money to triple itself at 20% annual compound interest? - Bulk purchase rabat
You can purchase a gross (12 dozen) of 1-inch tape at 93 cents per roll. Individual rolls of the same tape are $1.02 each. Describe the amount (in percent) that you will save if you take advantage of buying tape in bulk. - A student 5
A student took the measurements of his classroom and gave the width as 7m and the length as 9m. If there is an error of 2 percent in measurement, determine the greatest value of [X+Y]/X if X and Y are the width and length of the classroom, respectively. G - Colour
The square is divided into 100 squares. If you needed to color 49%, how many squares would you color? - Glue strength
At 40°C, it takes 3 hrs to get 125% glue strength. How long does it take to get 100% at 50 ˚C? The higher the temperature, the faster it cures the glue. - Joy deposited
Joy deposited the sum of 50,000 in her bank account. After 5 months, she made another deposit of 125,000 and 6 months a lap before the withdrawal of 12,000 nairas. If the interest rate is 5% per annual, calculate how much she should have in her account. - A piece 11
A piece of wood is 220cm long. If 66cm is cut away from the wood, what percentage remains? - Apples 29
In a fruit market, apples are currently £4 per kilogram. If you buy ten kilograms of apples, you will receive three-tenths of the total price. How much will you pay for ten kilograms of apples at the market? - Eva 46
Eva works as a sales clerk. She is paid a salary of 3000 a week plus a 2% commission on sales over 4000. Find her gross pay for a week in which her sales are 9500. - The radius 2
The radius of a circle is increased by 5%. What is the percentage increase in their circumference area? - A random
A random sample of 225 nails in a manufacturing company is gathered. The engineer specified that the specified length of a nail must be 8 cm having a standard deviation of 0.04 cm. It shows from the sample that the average length of the nails is 8.055 cm. - A promotion
Store A has a promotion. If you buy three shirts, you get 25% off the total price of the three shirts. Store B has the same shirts on sale with the promotion that if you buy three shirts, you get the third shirt at a 50% discount. Store C has the same shi - Percentage decrement
Decrease 360 by 10% - Markdown
February is sale month at the clothing store. All items are marked down 20 percent. If the sale price for a purse is $42, what was the price before the markdown? - Forty 8
Forty students took the math test. Thirty-two students received an A, and the rest received a B. What percent of the students received a B? - Out of 2
Out of 270 students in 6th grade, only 60% are going on the field trip. How many students are NOT going on the field trip? - 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. - A chemist 2
A chemist has two alloys of bronze, one that is 12% tin and 88% copper and a second that is 10% tin and 90% copper. If these two alloys are melted and thoroughly mixed together, between what two values are the percent of tin in the mixture? - Pets stores
Pets Plus and Pet Planet are having a sale on the same aquarium. At Pets Plus, the aquarium is on sale for 30% off the original price, and at Pet Planet, it is discounted by 25%. If the sales tax rate is 8%, which store has the lower sale price? How much - Pupils
There are 40 pupils in a class. 30% of them are boys. How many pupils in the class are girls?
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