Percentages - practice for 13 year olds - page 2 of 55
Number of problems found: 1099
- 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. - 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 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? - Represent 14
Represent 10% as a fraction reduced to the lowest term. - After 9
After reducing the price by 10%, the dress costs 270 GEL. What was the cost of the dress before it got cheaper? - Peter 17
Peter ate 9 ounces of chocolate cake which was 75% of the entire cake. Which expression can be used to find the size of the full cake? - Joey had
Joey had 70% of his money in a savings account. The rest of his money was in a cheque account. (a). What percentage of his money was in his cheque account? (b). He had $240 in his cheque account. How much money did he have in his savings account?
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