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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 919 · 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 1760 litres. 50% of the water is used. How many litres are left?
  2. 2.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  3. 3.A town has 4300 people. Its population grows by 15%. How many people live there now?
  4. 4.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹4660 to ₹3262. By what percent did it come down?
  6. 6.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.A town has 2520 people. Its population grows by 10%. How many people live there now?
  8. 8.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 1100 litres. 5% of the water is used. How many litres are left?
  10. 10.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  11. 11.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  12. 12.The price of a bicycle is ₹3940. It goes up by 10%. What is the new price (in ₹)?
  13. 13.The price of a school bag changes from ₹240 to ₹276. By what percent did it go up?
  14. 14.The price of a bicycle is ₹3040. It goes up by 40%. What is the new price (in ₹)?
  15. 15.A shop sells 3320 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.A water tank holds 1040 litres. 10% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹980 to ₹1274. By what percent did it go up?
  18. 18.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  19. 19.A water tank holds 4340 litres. 25% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹1500 to ₹750. By what percent did it come down?
  21. 21.A water tank holds 2120 litres. 40% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹3160 to ₹1580. By what percent did it come down?
  23. 23.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 4900 litres. 10% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹440 to ₹616. By what percent did it go up?
  26. 26.A water tank holds 1700 litres. 30% of the water is used. How many litres are left?
  27. 27.A shop sells 2760 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  28. 28.A water tank holds 1440 litres. 10% of the water is used. How many litres are left?
  29. 29.A water tank holds 5000 litres. 10% of the water is used. How many litres are left?
  30. 30.A shop sells 900 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  31. 31.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  32. 32.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  33. 33.A water tank holds 3340 litres. 15% of the water is used. How many litres are left?
  34. 34.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  35. 35.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  36. 36.A shop sells 1200 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  37. 37.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 700 litres. 15% of the water is used. How many litres are left?
  39. 39.A shop sells 1880 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  40. 40.The price of a bicycle is ₹500. It goes up by 5%. What is the new price (in ₹)?

Answer key

  1. 880
  2. 10.5
  3. 4945
  4. 20
  5. 30
  6. 54
  7. 2772
  8. 62.5
  9. 1045
  10. 82
  11. 68
  12. 4334
  13. 15
  14. 4256
  15. 3652
  16. 936
  17. 30
  18. 47
  19. 3255
  20. 50
  21. 1272
  22. 50
  23. 82
  24. 4410
  25. 40
  26. 1190
  27. 3864
  28. 1296
  29. 4500
  30. 1035
  31. 38
  32. 10.25
  33. 2839
  34. 62.5
  35. 37.5
  36. 1500
  37. 49.5
  38. 595
  39. 2256
  40. 525

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