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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 488 · 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 water tank holds 4840 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹4080. It goes up by 50%. What is the new price (in ₹)?
  3. 3.A water tank holds 760 litres. 40% of the water is used. How many litres are left?
  4. 4.A shop sells 1420 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹4380 to ₹3942. By what percent did it come down?
  6. 6.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹4420 to ₹4641. By what percent did it go up?
  8. 8.A water tank holds 3240 litres. 40% of the water is used. How many litres are left?
  9. 9.A town has 4720 people. Its population grows by 20%. How many people live there now?
  10. 10.A water tank holds 4900 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹2880 to ₹2736. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹1980 to ₹2376. By what percent did it go up?
  13. 13.A water tank holds 1840 litres. 15% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹380 to ₹304. By what percent did it come down?
  15. 15.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  16. 16.A town has 4100 people. Its population grows by 5%. How many people live there now?
  17. 17.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹1280 to ₹1664. By what percent did it go up?
  19. 19.A water tank holds 500 litres. 30% of the water is used. How many litres are left?
  20. 20.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  21. 21.A shop sells 4260 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  22. 22.The price of a bicycle is ₹4620. It goes up by 10%. What is the new price (in ₹)?
  23. 23.A water tank holds 1800 litres. 10% of the water is used. How many litres are left?
  24. 24.A water tank holds 4980 litres. 40% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹3420 to ₹2052. By what percent did it come down?
  26. 26.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  27. 27.A town has 2960 people. Its population grows by 20%. How many people live there now?
  28. 28.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  29. 29.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  30. 30.A shop sells 2300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  31. 31.A water tank holds 3240 litres. 10% of the water is used. How many litres are left?
  32. 32.A water tank holds 4900 litres. 15% of the water is used. How many litres are left?
  33. 33.A water tank holds 100 litres. 20% of the water is used. How many litres are left?
  34. 34.A shop sells 860 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  35. 35.The price of a school bag changes from ₹200 to ₹280. By what percent did it go up?
  36. 36.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  37. 37.A town has 2280 people. Its population grows by 5%. How many people live there now?
  38. 38.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  39. 39.A town has 4060 people. Its population grows by 50%. How many people live there now?
  40. 40.A water tank holds 1100 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 4598
  2. 6120
  3. 456
  4. 1988
  5. 10
  6. 20
  7. 5
  8. 1944
  9. 5664
  10. 3675
  11. 5
  12. 20
  13. 1564
  14. 20
  15. 46
  16. 4305
  17. 43.75
  18. 30
  19. 350
  20. 54
  21. 4473
  22. 5082
  23. 1620
  24. 2988
  25. 40
  26. 95
  27. 3552
  28. 33
  29. 56.25
  30. 2990
  31. 2916
  32. 4165
  33. 80
  34. 903
  35. 40
  36. 60
  37. 2394
  38. 72.5
  39. 6090
  40. 1045

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