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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 678 · 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 780 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  2. 2.The price of a bicycle is ₹2180. It goes up by 10%. What is the new price (in ₹)?
  3. 3.The price of a school bag changes from ₹1360 to ₹1768. By what percent did it go up?
  4. 4.A water tank holds 3780 litres. 5% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹5000. It goes up by 10%. What is the new price (in ₹)?
  6. 6.A water tank holds 3460 litres. 5% of the water is used. How many litres are left?
  7. 7.A water tank holds 1180 litres. 50% of the water is used. How many litres are left?
  8. 8.A shop sells 3140 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 4120 litres. 30% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹4400 to ₹4180. By what percent did it come down?
  12. 12.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  13. 13.The price of a school bag changes from ₹4420 to ₹5746. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹3040 to ₹2432. By what percent did it come down?
  15. 15.A town has 1720 people. Its population grows by 5%. How many people live there now?
  16. 16.The price of a school bag changes from ₹860 to ₹903. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹2100 to ₹2730. By what percent did it go up?
  18. 18.A water tank holds 2860 litres. 5% of the water is used. How many litres are left?
  19. 19.A shop sells 2740 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  20. 20.A town has 3120 people. Its population grows by 30%. How many people live there now?
  21. 21.The price of a school bag changes from ₹3360 to ₹2520. By what percent did it come down?
  22. 22.A water tank holds 160 litres. 10% of the water is used. How many litres are left?
  23. 23.A water tank holds 5000 litres. 10% of the water is used. How many litres are left?
  24. 24.A shop sells 4280 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  25. 25.A town has 4800 people. Its population grows by 5%. How many people live there now?
  26. 26.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  27. 27.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  28. 28.A water tank holds 880 litres. 30% of the water is used. How many litres are left?
  29. 29.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  30. 30.A water tank holds 640 litres. 5% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹1200 to ₹900. By what percent did it come down?
  32. 32.A town has 3440 people. Its population grows by 30%. How many people live there now?
  33. 33.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  34. 34.A water tank holds 1280 litres. 40% of the water is used. How many litres are left?
  35. 35.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  36. 36.A shop sells 300 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  37. 37.The price of a bicycle is ₹3320. It goes up by 25%. What is the new price (in ₹)?
  38. 38.A water tank holds 2420 litres. 30% of the water is used. How many litres are left?
  39. 39.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  40. 40.A water tank holds 4060 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 897
  2. 2398
  3. 30
  4. 3591
  5. 5500
  6. 3287
  7. 590
  8. 4396
  9. 65
  10. 2884
  11. 5
  12. 37
  13. 30
  14. 20
  15. 1806
  16. 5
  17. 30
  18. 2717
  19. 3014
  20. 4056
  21. 25
  22. 144
  23. 4500
  24. 5564
  25. 5040
  26. 110
  27. 52
  28. 616
  29. 33
  30. 608
  31. 25
  32. 4472
  33. 24
  34. 768
  35. 8
  36. 315
  37. 4150
  38. 1694
  39. 14.5
  40. 3451

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