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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 85 · 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 ₹1624. By what percent did it go up?
  2. 2.A water tank holds 3500 litres. 20% of the water is used. How many litres are left?
  3. 3.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 5000 litres. 15% of the water is used. How many litres are left?
  5. 5.A shop sells 4320 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  6. 6.A water tank holds 1680 litres. 20% of the water is used. How many litres are left?
  7. 7.A water tank holds 3240 litres. 15% of the water is used. How many litres are left?
  8. 8.A water tank holds 140 litres. 50% of the water is used. How many litres are left?
  9. 9.A water tank holds 4800 litres. 20% of the water is used. How many litres are left?
  10. 10.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  11. 11.The price of a bicycle is ₹4640. It goes up by 25%. What is the new price (in ₹)?
  12. 12.A shop sells 620 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.A water tank holds 3380 litres. 5% of the water is used. How many litres are left?
  14. 14.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹4820. It goes up by 50%. What is the new price (in ₹)?
  16. 16.A water tank holds 4300 litres. 20% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3040 to ₹3344. By what percent did it go up?
  18. 18.A water tank holds 1820 litres. 5% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹2660 to ₹2926. By what percent did it go up?
  20. 20.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  21. 21.The price of a school bag changes from ₹1820 to ₹2548. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹1140 to ₹1368. By what percent did it go up?
  23. 23.A water tank holds 3960 litres. 30% of the water is used. How many litres are left?
  24. 24.A water tank holds 1600 litres. 20% of the water is used. How many litres are left?
  25. 25.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  26. 26.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹1340 to ₹804. By what percent did it come down?
  28. 28.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹1980 to ₹2376. By what percent did it go up?
  30. 30.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  31. 31.A town has 2180 people. Its population grows by 20%. How many people live there now?
  32. 32.A water tank holds 1120 litres. 5% of the water is used. How many litres are left?
  33. 33.A water tank holds 2260 litres. 25% of the water is used. How many litres are left?
  34. 34.A water tank holds 4340 litres. 40% of the water is used. How many litres are left?
  35. 35.A water tank holds 2280 litres. 10% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹4680 to ₹2340. By what percent did it come down?
  37. 37.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  38. 38.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹1800 to ₹1350. By what percent did it come down?
  40. 40.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =

Answer key

  1. 40
  2. 2800
  3. 72.5
  4. 4250
  5. 6048
  6. 1344
  7. 2754
  8. 70
  9. 3840
  10. 9.75
  11. 5800
  12. 744
  13. 3211
  14. 56
  15. 7230
  16. 3440
  17. 10
  18. 1729
  19. 10
  20. 57.5
  21. 40
  22. 20
  23. 2772
  24. 1280
  25. 19
  26. 23.5
  27. 40
  28. 36.25
  29. 20
  30. 49
  31. 2616
  32. 1064
  33. 1695
  34. 2604
  35. 2052
  36. 50
  37. 32
  38. 28.75
  39. 25
  40. 9.25

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