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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 920 · 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 price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  2. 2.A town has 4000 people. Its population grows by 50%. How many people live there now?
  3. 3.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  4. 4.The price of a school bag changes from ₹4960 to ₹5704. By what percent did it go up?
  5. 5.A shop sells 3720 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  6. 6.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  7. 7.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  8. 8.A shop sells 4640 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  9. 9.The price of a bicycle is ₹640. It goes up by 30%. What is the new price (in ₹)?
  10. 10.A water tank holds 560 litres. 15% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹3200 to ₹4480. By what percent did it go up?
  12. 12.A water tank holds 4340 litres. 10% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹1320 to ₹1980. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹1780 to ₹2136. By what percent did it go up?
  15. 15.A shop sells 4360 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.A town has 4140 people. Its population grows by 20%. How many people live there now?
  17. 17.The price of a school bag changes from ₹1200 to ₹1260. By what percent did it go up?
  18. 18.A water tank holds 3060 litres. 25% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹3800 to ₹3990. By what percent did it go up?
  20. 20.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 2080 litres. 30% of the water is used. How many litres are left?
  22. 22.A shop sells 4240 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  23. 23.The price of a bicycle is ₹2380. It goes up by 5%. What is the new price (in ₹)?
  24. 24.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  25. 25.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹940 to ₹987. By what percent did it go up?
  28. 28.The price of a bicycle is ₹3080. It goes up by 15%. What is the new price (in ₹)?
  29. 29.A water tank holds 380 litres. 15% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹2360. It goes up by 20%. What is the new price (in ₹)?
  31. 31.A water tank holds 3400 litres. 15% of the water is used. How many litres are left?
  32. 32.A water tank holds 700 litres. 10% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹3300. It goes up by 5%. What is the new price (in ₹)?
  34. 34.A water tank holds 1180 litres. 20% of the water is used. How many litres are left?
  35. 35.A town has 2820 people. Its population grows by 25%. How many people live there now?
  36. 36.A water tank holds 2140 litres. 5% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹620 to ₹310. By what percent did it come down?
  38. 38.The price of a bicycle is ₹4880. It goes up by 30%. What is the new price (in ₹)?
  39. 39.The price of a school bag changes from ₹4540 to ₹3178. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹2140 to ₹1926. By what percent did it come down?

Answer key

  1. 12
  2. 6000
  3. 82
  4. 15
  5. 5580
  6. 72.5
  7. 17
  8. 6032
  9. 832
  10. 476
  11. 40
  12. 3906
  13. 50
  14. 20
  15. 4796
  16. 4968
  17. 5
  18. 2295
  19. 5
  20. 43
  21. 1456
  22. 4876
  23. 2499
  24. 14.5
  25. 38
  26. 8
  27. 5
  28. 3542
  29. 323
  30. 2832
  31. 2890
  32. 630
  33. 3465
  34. 944
  35. 3525
  36. 2033
  37. 50
  38. 6344
  39. 30
  40. 10

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