← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 508 · 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 680 litres. 25% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2660 to ₹2394. By what percent did it come down?
  3. 3.A shop sells 700 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  4. 4.A water tank holds 580 litres. 15% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹2200 to ₹2860. By what percent did it go up?
  6. 6.A water tank holds 1580 litres. 10% of the water is used. How many litres are left?
  7. 7.A water tank holds 640 litres. 15% of the water is used. How many litres are left?
  8. 8.A town has 3860 people. Its population grows by 50%. How many people live there now?
  9. 9.A shop sells 1020 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  10. 10.A town has 4380 people. Its population grows by 40%. How many people live there now?
  11. 11.A shop sells 1440 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  12. 12.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹4700 to ₹4230. By what percent did it come down?
  14. 14.The price of a bicycle is ₹3520. It goes up by 10%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹1460 to ₹1387. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹4360 to ₹2616. By what percent did it come down?
  17. 17.The price of a school bag changes from ₹3840 to ₹4224. By what percent did it go up?
  18. 18.A shop sells 60 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  19. 19.A water tank holds 4540 litres. 20% of the water is used. How many litres are left?
  20. 20.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹3760 to ₹4136. By what percent did it go up?
  22. 22.A water tank holds 3800 litres. 5% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹2920 to ₹1460. By what percent did it come down?
  24. 24.A shop sells 2520 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  25. 25.A water tank holds 1020 litres. 20% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹3300 to ₹3465. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹1040 to ₹884. By what percent did it come down?
  28. 28.The price of a bicycle is ₹60. It goes up by 5%. What is the new price (in ₹)?
  29. 29.A water tank holds 1960 litres. 25% of the water is used. How many litres are left?
  30. 30.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  31. 31.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  32. 32.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  33. 33.A town has 1100 people. Its population grows by 30%. How many people live there now?
  34. 34.A water tank holds 260 litres. 10% of the water is used. How many litres are left?
  35. 35.A water tank holds 4320 litres. 40% of the water is used. How many litres are left?
  36. 36.A shop sells 480 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  37. 37.A town has 2180 people. Its population grows by 30%. How many people live there now?
  38. 38.A shop sells 3220 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  39. 39.A water tank holds 3140 litres. 40% of the water is used. How many litres are left?
  40. 40.A water tank holds 4960 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 510
  2. 10
  3. 840
  4. 493
  5. 30
  6. 1422
  7. 544
  8. 5790
  9. 1122
  10. 6132
  11. 1512
  12. 47
  13. 10
  14. 3872
  15. 5
  16. 40
  17. 10
  18. 78
  19. 3632
  20. 37.5
  21. 10
  22. 3610
  23. 50
  24. 3780
  25. 816
  26. 5
  27. 15
  28. 63
  29. 1470
  30. 43.75
  31. 64
  32. 28
  33. 1430
  34. 234
  35. 2592
  36. 600
  37. 2834
  38. 4508
  39. 1884
  40. 3472

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