← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 885 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.A water tank holds 3460 litres. 30% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹3600 to ₹4680. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹1520 to ₹1064. By what percent did it come down?
  4. 4.A water tank holds 960 litres. 10% of the water is used. How many litres are left?
  5. 5.A water tank holds 1180 litres. 5% of the water is used. How many litres are left?
  6. 6.A water tank holds 1940 litres. 50% of the water is used. How many litres are left?
  7. 7.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  8. 8.A town has 3120 people. Its population grows by 50%. How many people live there now?
  9. 9.A water tank holds 1240 litres. 50% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1000 to ₹750. By what percent did it come down?
  11. 11.A town has 1100 people. Its population grows by 30%. How many people live there now?
  12. 12.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹1740 to ₹2088. By what percent did it go up?
  14. 14.A water tank holds 220 litres. 50% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹420 to ₹546. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹400 to ₹460. By what percent did it go up?
  17. 17.A water tank holds 640 litres. 30% of the water is used. How many litres are left?
  18. 18.A water tank holds 640 litres. 15% of the water is used. How many litres are left?
  19. 19.A shop sells 2580 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  20. 20.The price of a school bag changes from ₹1540 to ₹2002. By what percent did it go up?
  21. 21.A shop sells 2720 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  22. 22.A shop sells 1780 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  23. 23.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 2320 litres. 20% of the water is used. How many litres are left?
  25. 25.A town has 4060 people. Its population grows by 50%. How many people live there now?
  26. 26.The price of a school bag changes from ₹2520 to ₹2772. By what percent did it go up?
  27. 27.A water tank holds 1940 litres. 15% of the water is used. How many litres are left?
  28. 28.A water tank holds 3100 litres. 50% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹2040 to ₹1530. By what percent did it come down?
  30. 30.A water tank holds 2520 litres. 15% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹4240. It goes up by 10%. What is the new price (in ₹)?
  32. 32.A shop sells 360 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  33. 33.A shop sells 2060 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  34. 34.A town has 1440 people. Its population grows by 50%. How many people live there now?
  35. 35.The price of a school bag changes from ₹1820 to ₹2548. By what percent did it go up?
  36. 36.A town has 180 people. Its population grows by 25%. How many people live there now?
  37. 37.The price of a school bag changes from ₹4580 to ₹4809. By what percent did it go up?
  38. 38.A shop sells 4940 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  39. 39.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  40. 40.A town has 1860 people. Its population grows by 15%. How many people live there now?

Answer key

  1. 2422
  2. 30
  3. 30
  4. 864
  5. 1121
  6. 970
  7. 65
  8. 4680
  9. 620
  10. 25
  11. 1430
  12. 61
  13. 20
  14. 110
  15. 30
  16. 15
  17. 448
  18. 544
  19. 3612
  20. 30
  21. 3400
  22. 2225
  23. 56
  24. 1856
  25. 6090
  26. 10
  27. 1649
  28. 1550
  29. 25
  30. 2142
  31. 4664
  32. 414
  33. 2472
  34. 2160
  35. 40
  36. 225
  37. 5
  38. 5434
  39. 52
  40. 2139

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude