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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 737 · 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.The price of a school bag changes from ₹1440 to ₹1512. By what percent did it go up?
  2. 2.A shop sells 2200 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  4. 4.A shop sells 600 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹300 to ₹450. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹4960 to ₹3720. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹2580 to ₹1935. By what percent did it come down?
  8. 8.A shop sells 600 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  9. 9.The price of a bicycle is ₹3660. It goes up by 5%. What is the new price (in ₹)?
  10. 10.The price of a school bag changes from ₹800 to ₹1120. By what percent did it go up?
  11. 11.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  12. 12.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  14. 14.The price of a bicycle is ₹3140. It goes up by 20%. What is the new price (in ₹)?
  15. 15.A water tank holds 3380 litres. 5% of the water is used. How many litres are left?
  16. 16.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  17. 17.A town has 580 people. Its population grows by 25%. How many people live there now?
  18. 18.A town has 460 people. Its population grows by 5%. How many people live there now?
  19. 19.A shop sells 780 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  20. 20.The price of a school bag changes from ₹5000 to ₹7000. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹1400 to ₹1540. By what percent did it go up?
  22. 22.A water tank holds 3960 litres. 15% of the water is used. How many litres are left?
  23. 23.A town has 2040 people. Its population grows by 25%. How many people live there now?
  24. 24.The price of a school bag changes from ₹1040 to ₹1560. By what percent did it go up?
  25. 25.The price of a bicycle is ₹4780. It goes up by 30%. What is the new price (in ₹)?
  26. 26.A town has 560 people. Its population grows by 10%. How many people live there now?
  27. 27.A shop sells 1880 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  28. 28.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹340 to ₹442. By what percent did it go up?
  30. 30.A water tank holds 2460 litres. 20% of the water is used. How many litres are left?
  31. 31.A shop sells 2440 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  32. 32.A shop sells 4420 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  33. 33.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  34. 34.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹4900 to ₹6125. By what percent did it go up?
  36. 36.A water tank holds 1180 litres. 25% of the water is used. How many litres are left?
  37. 37.A water tank holds 2220 litres. 40% of the water is used. How many litres are left?
  38. 38.A town has 2520 people. Its population grows by 40%. How many people live there now?
  39. 39.A water tank holds 2000 litres. 30% of the water is used. How many litres are left?
  40. 40.A water tank holds 500 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 5
  2. 2310
  3. 47
  4. 660
  5. 50
  6. 25
  7. 25
  8. 720
  9. 3843
  10. 40
  11. 32
  12. 21
  13. 24
  14. 3768
  15. 3211
  16. 55
  17. 725
  18. 483
  19. 1014
  20. 40
  21. 10
  22. 3366
  23. 2550
  24. 50
  25. 6214
  26. 616
  27. 2162
  28. 87.5
  29. 30
  30. 1968
  31. 3660
  32. 4641
  33. 36.5
  34. 49.5
  35. 25
  36. 885
  37. 1332
  38. 3528
  39. 1400
  40. 450

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