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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 149 · 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 15% and then goes up by 20% more. By what percent has it gone up in all? =
  2. 2.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹3560 to ₹3204. By what percent did it come down?
  4. 4.A shop sells 4600 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹620 to ₹713. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹700 to ₹1050. By what percent did it go up?
  7. 7.A water tank holds 180 litres. 30% of the water is used. How many litres are left?
  8. 8.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  9. 9.A water tank holds 3340 litres. 20% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹3560 to ₹3916. By what percent did it go up?
  11. 11.A price comes down by 30% 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 20% more. By what percent has it gone up in all? =
  13. 13.A shop sells 3300 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  14. 14.A water tank holds 1620 litres. 30% of the water is used. How many litres are left?
  15. 15.A water tank holds 860 litres. 15% of the water is used. How many litres are left?
  16. 16.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.A shop sells 60 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹4120 to ₹5150. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹4580 to ₹4122. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹900 to ₹855. By what percent did it come down?
  21. 21.A water tank holds 860 litres. 10% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹4880 to ₹5368. By what percent did it go up?
  23. 23.A shop sells 4100 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  24. 24.A shop sells 920 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  25. 25.A town has 4780 people. Its population grows by 10%. How many people live there now?
  26. 26.A water tank holds 3380 litres. 20% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹320. It goes up by 15%. What is the new price (in ₹)?
  28. 28.A shop sells 1340 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹2480 to ₹2232. By what percent did it come down?
  30. 30.A town has 4320 people. Its population grows by 30%. How many people live there now?
  31. 31.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹2780 to ₹3475. By what percent did it go up?
  33. 33.A water tank holds 1220 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹260. It goes up by 5%. What is the new price (in ₹)?
  35. 35.A water tank holds 3580 litres. 15% of the water is used. How many litres are left?
  36. 36.A shop sells 2160 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  37. 37.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A shop sells 400 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  39. 39.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 1760 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 38
  2. 40
  3. 10
  4. 4830
  5. 15
  6. 50
  7. 126
  8. 28.75
  9. 2672
  10. 10
  11. 44
  12. 32
  13. 4620
  14. 1134
  15. 731
  16. 20.75
  17. 84
  18. 25
  19. 10
  20. 5
  21. 774
  22. 10
  23. 4715
  24. 1058
  25. 5258
  26. 2704
  27. 368
  28. 1608
  29. 10
  30. 5616
  31. 65
  32. 25
  33. 915
  34. 273
  35. 3043
  36. 3024
  37. 50
  38. 500
  39. 87.5
  40. 1056

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