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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 398 · 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 2860 litres. 50% of the water is used. How many litres are left?
  2. 2.A town has 2920 people. Its population grows by 30%. How many people live there now?
  3. 3.A water tank holds 3580 litres. 10% of the water is used. How many litres are left?
  4. 4.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  5. 5.A water tank holds 1460 litres. 30% of the water is used. How many litres are left?
  6. 6.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹580 to ₹667. By what percent did it go up?
  8. 8.The price of a bicycle is ₹2960. It goes up by 50%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹2120 to ₹3180. By what percent did it go up?
  10. 10.The price of a bicycle is ₹2600. It goes up by 10%. What is the new price (in ₹)?
  11. 11.A town has 940 people. Its population grows by 50%. How many people live there now?
  12. 12.The price of a school bag changes from ₹1200 to ₹1020. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹3480 to ₹2958. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹140 to ₹168. By what percent did it go up?
  15. 15.A shop sells 860 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.The price of a bicycle is ₹1420. It goes up by 40%. What is the new price (in ₹)?
  17. 17.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  18. 18.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  19. 19.The price of a school bag changes from ₹580 to ₹348. By what percent did it come down?
  20. 20.A shop sells 1140 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  21. 21.A town has 2340 people. Its population grows by 10%. How many people live there now?
  22. 22.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  23. 23.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  24. 24.A water tank holds 3760 litres. 25% of the water is used. How many litres are left?
  25. 25.A water tank holds 1180 litres. 30% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹4420. It goes up by 10%. What is the new price (in ₹)?
  27. 27.The price of a bicycle is ₹940. It goes up by 5%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹3380 to ₹2366. By what percent did it come down?
  29. 29.A water tank holds 4760 litres. 50% of the water is used. How many litres are left?
  30. 30.A water tank holds 100 litres. 10% of the water is used. How many litres are left?
  31. 31.A water tank holds 3780 litres. 20% of the water is used. How many litres are left?
  32. 32.A shop sells 1980 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  33. 33.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  34. 34.The price of a bicycle is ₹3620. It goes up by 30%. What is the new price (in ₹)?
  35. 35.A town has 2220 people. Its population grows by 50%. How many people live there now?
  36. 36.The price of a bicycle is ₹1300. It goes up by 5%. What is the new price (in ₹)?
  37. 37.A water tank holds 1220 litres. 25% of the water is used. How many litres are left?
  38. 38.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹1620 to ₹2025. By what percent did it go up?
  40. 40.A town has 4480 people. Its population grows by 30%. How many people live there now?

Answer key

  1. 1430
  2. 3796
  3. 3222
  4. 19.25
  5. 1022
  6. 110
  7. 15
  8. 4440
  9. 50
  10. 2860
  11. 1410
  12. 15
  13. 15
  14. 20
  15. 946
  16. 1988
  17. 46
  18. 58
  19. 40
  20. 1311
  21. 2574
  22. 80
  23. 32.5
  24. 2820
  25. 826
  26. 4862
  27. 987
  28. 30
  29. 2380
  30. 90
  31. 3024
  32. 2376
  33. 55
  34. 4706
  35. 3330
  36. 1365
  37. 915
  38. 20.75
  39. 25
  40. 5824

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