Math topic中文

Express as percentage

expressing one quantity as a percentage of another

Practice questions

  1. 1一根绳子长45\dfrac{4}{5}米，也就是80％80％米． ___ . (.\:(判断对错))
  2. 2Hamid borrowed a sum of money for 3 years at an interest rate of 3.5% per annum simple interest to pay for his car. If t…
  3. 3| Carton | Number of toys | Percentage of toys which are defective | | :--- | :---: | :---: | | A | 200 | 3% | | B | 300…
  4. 4某商场进行促销活动，对一些商品打折出售，妈妈在商场花了 240 元买了一件衣服，比原价便宜了 60 元。这件衣服是打（ ）折出售的。 A. 二五 B. 四 C. 五 D. 八
  5. 5()20=11.9÷17=35\dfrac{(\quad)}{20}=11.9÷17=35：==％％
  6. 6The marked price of a mobile phone is $1288. After selling the mobile phone at 15% discount, the shop owner still makes…
  7. 7Sam is a 40-year-old man who earns a gross salary of $8000 a month. He is a Singaporean and an employee of a Singapore…
  8. 8The table below shows the number of toys collected by Sunshine Centre in Year 2021 and Year 2022. Part of the table is c…
  9. 9The pie chart shows how Michael spent his money. How much money did Michael spend on the book? Answer : (a) ‾\underline{\qquad\qquad\qquad}…
  10. 10百分之三十五写作 （ ___ ） ，0.056%读作 （ ___ ） 。
  11. 11Last month, Rachel saved $90 and spent the rest of her pocket money. If she increased her spendings by 40%, her savings…
  12. 12A packet of chocolates contains pieces of milk, dark and orange chocolates. 25% of the chocolates are dark chocolates. T…
  13. 13The figure shows a solid frustum of height 16 cm cut from a right pyramid with square base. The horizontal top surface h…
  14. 14The ratio of the number of girls to boys in Hall A is 7 : 3. The ratio of the number of girls to boys in Hall B is 2 : 7…
  15. 15A chess club currently has 37 male members and 16 female members. The club hosted a Valentine's Day event to attract mar…
  16. 16The bar graph shows the number of files sold from March to July. In which of the following months was the percentage cha…
  17. 17The following stem-and-leaf diagram shows the marks obtained by 20 pupils in a class test that has a total mark of 50. S…
  18. 18The bar graph below shows the number of members in a fitness club from 2018 to 2022. Study the graph and answer question…
  19. 19Which of the following shows 25% of the figure shaded?
  20. 20Write the following numbers in order of size, starting with the smallest. −9.87-\sqrt{9.87}, −227-\dfrac{22}{7}, -314.2%, −3.143-3.143…
  21. 21The cost of manufacturing a sofa is S$1500. It is sold to a retailer at a profit of 15% of the cost. Calculate the pric…
  22. 22The stem and leaf diagram below shows the marks obtained by 30 students in a Science test marked out of 80 marks. Find t…
  23. 23John conducted a survey on the average time spent reading per week. This survey was carried out outside Woodlands Region…
  24. 24The table below shows the favourite subject of the students in Primary 6C. It is used to draw the pie chart shown. Mathe…
  25. 256÷6÷=18(ㅤㅤ)==\dfrac{18}{(ㅤㅤ)}=：12=0.75=12=0.75=___％％
  26. 26A group of students sat for an examination. 50% of the boys and 40% of the girls passed the examination. Megan commented…
  27. 27The usual price of a study table was $300. During a sale, Mrs Kumar bought 2 such study tables at a discount of 60%. Ho…
  28. 28In a school, 40% of the pupils are boys. 5% of the boys and 20% of the girls walk to school. What percentage of the pupi…
  29. 29The table below shows the number of toys collected by Sunshine Centre in Year 2021 and Year 2022. Part of the table is c…
  30. 3020222022年元旦，商场举办优惠大酬宾：每满400400元立减100100元。一台烤箱标价500500元，相当于这件商品打()(\quad)折？ A. 二 B. 八 C. 七五 D. 二五
  31. 31发芽率不一定小于100%，但出油率一定小于100%． ．
  32. 32Susan had 117 beads and marbles altogether. The beads and marbles were either white or black. 20%20\% of the beads and 50%50\%…
  33. 33The pie chart shows the favourite snacks of students in School A and B. Each statement below is either true, false or no…
  34. 34John owns a cleaning company that cleans office blocks. The number of employees in his company and their salaries in 202…
  35. 35Alice was given the same amount of pocket money every day. The line graph shows the amount of money she had left at the…
  36. 36A company divided a bonus among its employees A, B, and C in the ratio 2 : 3 : 7. C's bonus was X% more than the combine…
  37. 37A cake shop sells 3 types of cakes. On Day 1, the shop sold 84 chocolate cakes, 90 vanilla cakes and 56 strawberry cakes…
  38. 38After a 20% discount, the price of a T-shirt was $40. A first-time customer was given a further discount of $6. What w…
  39. 39Meifang spent 20% of her money on a shirt. She used the rest of the money to buy a bag and a necklace. The bag cost $24…
  40. 40The pie chart below shows the favourite ball games of a group of students. Part of the data is also represented in the b…
  41. 41The table shows the currency exchange rate between Singapore dollars ($) and Thai Baht (THB) at a money changer. Before…
  42. 42A box contained some twenty-cent, fifty-cent and one-dollar coins. 24%24\% of the coins are twenty-cent coins. The ratio…
  43. 43小丽同学共投篮球1010个，命中55个，小丽同学的命中率是 ___ .
  44. 44Javelle went to a café and ordered a slice of cake and a cup of tea. Unfortunately, the receipt was stained and parts of…
  45. 45一个加湿器，降价 32 元后，现在售价 96 元，价格降低了 ___ % 。
  46. 46y is proportional to xnx^n. x and y are the length and breadth of a rectangle with a fixed area. State the value of n. F…
  47. 47The cash price of a washing machine is $840. If paid by hire purchase scheme, the deposit is 15% of the cash price and…
  48. 48Mr Raja paid a total of $1406.40 for a laptop and a camera at a sale. The price of the camera before discount was $864…
  49. 49打九折出售，就是按原价的 ％出售，比原价便宜了 ％
  50. 50Uncle Lim has 4 boxes of fruits, Box A, Box B, Box C and Box D. The bar graph below shows the number of fruits in each b…
  51. 51Abraham invested $18 000 in an investment fund. The bank paid 4% interest at the end of each year. How much interest di…
  52. 52At first, 80% of a tank was filled with water. Chris turned on Tap A to allow water to flow out of the tank. 4 minutes l…
  53. 53（1）医院医改取消药品加价15%，医院管理控制医生乱开药，制定了每个临床科室的药品占整个医疗收入的比例，内科系统医改前的药占比为39.5%，那么医改后应为多少？ （2）这次医改相应提高了医疗价格用于弥补药品取消加价减少的收入，弥补的幅度为药…
  54. 54A sheet of rectangular paper has length ll cm and breadth bb cm. If identical squares of side 3 cm are to be cut out f…
  55. 55Adam Electronics Store gave a storewide discount of 20% during its annual sale. As a member of the store, Ming Hui is en…
  56. 56小利的身高是150%米．（判断对错）
  57. 57At a walkathon, each participant from Group A and B completed either a 2-km route, 5-km route or 10-km route. The pie ch…
  58. 58PR is a diameter of the large circle, centre O. QS is a diameter of the small circle, centre O. PQ and RS are tangents t…
  59. 59AC is a diameter of a circle with centre O. AC=2rAC = \sqrt{2}r and AB=BCAB = BC. COB is a semi-circular arc, centre P. What p…
  60. 60在1至15的整数中，最大的合数是 ，质数的个数是合数个数的 %．