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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 512 · 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 4860 litres. 50% of the water is used. How many litres are left?
  2. 2.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  3. 3.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  4. 4.The price of a bicycle is ₹1620. It goes up by 40%. What is the new price (in ₹)?
  5. 5.A water tank holds 2640 litres. 10% of the water is used. How many litres are left?
  6. 6.A water tank holds 1340 litres. 10% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹4860. It goes up by 15%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹920 to ₹552. By what percent did it come down?
  9. 9.A water tank holds 2700 litres. 25% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹2960. It goes up by 5%. What is the new price (in ₹)?
  11. 11.A shop sells 920 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  12. 12.The price of a school bag changes from ₹2700 to ₹2970. By what percent did it go up?
  13. 13.A town has 1980 people. Its population grows by 25%. How many people live there now?
  14. 14.The price of a bicycle is ₹2000. It goes up by 30%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹1540. It goes up by 25%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹3760 to ₹4512. By what percent did it go up?
  17. 17.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.A town has 3360 people. Its population grows by 20%. How many people live there now?
  19. 19.A shop sells 3200 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  20. 20.The price of a bicycle is ₹540. It goes up by 15%. What is the new price (in ₹)?
  21. 21.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹1420 to ₹1136. By what percent did it come down?
  23. 23.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹4920 to ₹3690. By what percent did it come down?
  26. 26.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  27. 27.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹1860 to ₹1116. By what percent did it come down?
  29. 29.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹4260 to ₹5325. By what percent did it go up?
  32. 32.A water tank holds 3480 litres. 40% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹2600 to ₹3250. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹3780 to ₹4158. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹1720 to ₹860. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹4040 to ₹3434. By what percent did it come down?
  37. 37.A water tank holds 2780 litres. 50% of the water is used. How many litres are left?
  38. 38.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  39. 39.A water tank holds 1380 litres. 5% of the water is used. How many litres are left?
  40. 40.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =

Answer key

  1. 2430
  2. 32.5
  3. 37
  4. 2268
  5. 2376
  6. 1206
  7. 5589
  8. 40
  9. 2025
  10. 3108
  11. 1196
  12. 10
  13. 2475
  14. 2600
  15. 1925
  16. 20
  17. 15.5
  18. 4032
  19. 3520
  20. 621
  21. 24
  22. 20
  23. 20.75
  24. 43.75
  25. 25
  26. 62.5
  27. 26
  28. 40
  29. 44
  30. 32
  31. 25
  32. 2088
  33. 25
  34. 10
  35. 50
  36. 15
  37. 1390
  38. 3.5
  39. 1311
  40. 72.5

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