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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 942 · 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 shop sells 2580 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  2. 2.The price of a bicycle is ₹3460. It goes up by 30%. What is the new price (in ₹)?
  3. 3.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  4. 4.A town has 1240 people. Its population grows by 50%. How many people live there now?
  5. 5.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  6. 6.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  7. 7.A water tank holds 860 litres. 5% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹180 to ₹126. By what percent did it come down?
  9. 9.A town has 4520 people. Its population grows by 15%. How many people live there now?
  10. 10.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  11. 11.A town has 740 people. Its population grows by 25%. How many people live there now?
  12. 12.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  13. 13.A water tank holds 3560 litres. 30% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹4320 to ₹5616. By what percent did it go up?
  15. 15.The price of a bicycle is ₹2340. It goes up by 5%. What is the new price (in ₹)?
  16. 16.A water tank holds 4740 litres. 10% of the water is used. How many litres are left?
  17. 17.A water tank holds 1860 litres. 30% of the water is used. How many litres are left?
  18. 18.A water tank holds 3240 litres. 50% of the water is used. How many litres are left?
  19. 19.The price of a bicycle is ₹2940. It goes up by 15%. What is the new price (in ₹)?
  20. 20.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹1680 to ₹1596. By what percent did it come down?
  22. 22.A town has 1980 people. Its population grows by 10%. How many people live there now?
  23. 23.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  24. 24.The price of a bicycle is ₹760. It goes up by 5%. What is the new price (in ₹)?
  25. 25.A water tank holds 840 litres. 5% of the water is used. How many litres are left?
  26. 26.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹1160 to ₹1450. By what percent did it go up?
  28. 28.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  29. 29.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  30. 30.The price of a school bag changes from ₹840 to ₹1092. By what percent did it go up?
  31. 31.A town has 440 people. Its population grows by 5%. How many people live there now?
  32. 32.A water tank holds 5000 litres. 5% of the water is used. How many litres are left?
  33. 33.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 3560 litres. 5% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹780 to ₹585. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹500 to ₹350. By what percent did it come down?
  37. 37.A water tank holds 2460 litres. 50% of the water is used. How many litres are left?
  38. 38.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 2820 litres. 30% of the water is used. How many litres are left?
  40. 40.A water tank holds 400 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 2838
  2. 4498
  3. 31.25
  4. 1860
  5. 65
  6. 52.5
  7. 817
  8. 30
  9. 5198
  10. 33
  11. 925
  12. 58
  13. 2492
  14. 30
  15. 2457
  16. 4266
  17. 1302
  18. 1620
  19. 3381
  20. 8
  21. 5
  22. 2178
  23. 65
  24. 798
  25. 798
  26. 19
  27. 25
  28. 32.5
  29. 23.5
  30. 30
  31. 462
  32. 4750
  33. 96
  34. 3382
  35. 25
  36. 30
  37. 1230
  38. 95
  39. 1974
  40. 300

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