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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 323 · 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 town has 3780 people. Its population grows by 25%. How many people live there now?
  2. 2.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  3. 3.A water tank holds 3640 litres. 50% of the water is used. How many litres are left?
  4. 4.A shop sells 4460 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  5. 5.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹1880 to ₹2068. By what percent did it go up?
  7. 7.A water tank holds 4720 litres. 30% of the water is used. How many litres are left?
  8. 8.A water tank holds 3160 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 4740 litres. 20% of the water is used. How many litres are left?
  10. 10.A shop sells 860 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  11. 11.The price of a school bag changes from ₹4360 to ₹3488. By what percent did it come down?
  12. 12.A shop sells 4760 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  14. 14.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  15. 15.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  16. 16.A water tank holds 1060 litres. 5% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹1660 to ₹996. By what percent did it come down?
  18. 18.A water tank holds 4960 litres. 50% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹3480 to ₹4872. By what percent did it go up?
  20. 20.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  21. 21.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹940 to ₹1081. By what percent did it go up?
  23. 23.A water tank holds 460 litres. 30% of the water is used. How many litres are left?
  24. 24.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.A water tank holds 200 litres. 30% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹3240 to ₹2754. By what percent did it come down?
  27. 27.The price of a bicycle is ₹2880. It goes up by 25%. What is the new price (in ₹)?
  28. 28.A water tank holds 500 litres. 25% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹2760. It goes up by 30%. What is the new price (in ₹)?
  30. 30.A shop sells 2120 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  31. 31.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  32. 32.The price of a bicycle is ₹3060. It goes up by 5%. What is the new price (in ₹)?
  33. 33.A water tank holds 2600 litres. 50% of the water is used. How many litres are left?
  34. 34.A shop sells 4760 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  35. 35.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.A water tank holds 2240 litres. 5% of the water is used. How many litres are left?
  37. 37.A town has 4720 people. Its population grows by 20%. How many people live there now?
  38. 38.The price of a school bag changes from ₹3380 to ₹4732. By what percent did it go up?
  39. 39.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹4840 to ₹5566. By what percent did it go up?

Answer key

  1. 4725
  2. 4.5
  3. 1820
  4. 5129
  5. 38
  6. 10
  7. 3304
  8. 3002
  9. 3792
  10. 903
  11. 20
  12. 5712
  13. 47
  14. 54
  15. 58
  16. 1007
  17. 40
  18. 2480
  19. 40
  20. 37.5
  21. 36.5
  22. 15
  23. 322
  24. 49
  25. 140
  26. 15
  27. 3600
  28. 375
  29. 3588
  30. 2650
  31. 23.5
  32. 3213
  33. 1300
  34. 5474
  35. 58
  36. 2128
  37. 5664
  38. 40
  39. 72.5
  40. 15

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