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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 676 · 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 ₹1160 to ₹1392. By what percent did it go up?
  2. 2.A shop sells 3420 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  3. 3.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  4. 4.The price of a school bag changes from ₹3240 to ₹2916. By what percent did it come down?
  5. 5.A water tank holds 2100 litres. 30% of the water is used. How many litres are left?
  6. 6.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  7. 7.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  8. 8.A town has 3720 people. Its population grows by 5%. How many people live there now?
  9. 9.The price of a school bag changes from ₹3980 to ₹5174. By what percent did it go up?
  10. 10.The price of a bicycle is ₹1480. It goes up by 40%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹2100 to ₹2625. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹2300 to ₹1150. By what percent did it come down?
  13. 13.The price of a bicycle is ₹4760. It goes up by 5%. What is the new price (in ₹)?
  14. 14.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  15. 15.A shop sells 1000 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.A shop sells 560 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹1460 to ₹1679. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹1280 to ₹1344. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹3760 to ₹4888. By what percent did it go up?
  20. 20.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  21. 21.A water tank holds 1200 litres. 40% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹460 to ₹276. By what percent did it come down?
  23. 23.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹3200 to ₹4160. By what percent did it go up?
  25. 25.A water tank holds 1460 litres. 5% of the water is used. How many litres are left?
  26. 26.A water tank holds 660 litres. 10% of the water is used. How many litres are left?
  27. 27.A water tank holds 940 litres. 5% of the water is used. How many litres are left?
  28. 28.A town has 140 people. Its population grows by 5%. How many people live there now?
  29. 29.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  30. 30.A water tank holds 2060 litres. 5% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹120 to ₹72. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹1980 to ₹1881. By what percent did it come down?
  33. 33.The price of a bicycle is ₹1740. It goes up by 5%. What is the new price (in ₹)?
  34. 34.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  35. 35.A shop sells 960 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  36. 36.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  37. 37.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  38. 38.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  39. 39.The price of a bicycle is ₹3600. It goes up by 10%. What is the new price (in ₹)?
  40. 40.A town has 1600 people. Its population grows by 5%. How many people live there now?

Answer key

  1. 20
  2. 3762
  3. 20.75
  4. 10
  5. 1470
  6. 32.5
  7. 33.5
  8. 3906
  9. 30
  10. 2072
  11. 25
  12. 50
  13. 4998
  14. 82
  15. 1100
  16. 672
  17. 15
  18. 5
  19. 30
  20. 70
  21. 720
  22. 40
  23. 28
  24. 30
  25. 1387
  26. 594
  27. 893
  28. 147
  29. 9.75
  30. 1957
  31. 40
  32. 5
  33. 1827
  34. 36.5
  35. 1008
  36. 36
  37. 95
  38. 9.25
  39. 3960
  40. 1680

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