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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 646 · 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 comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  2. 2.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 1800 litres. 10% of the water is used. How many litres are left?
  5. 5.A shop sells 3760 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  6. 6.A town has 4960 people. Its population grows by 25%. How many people live there now?
  7. 7.The price of a bicycle is ₹2340. It goes up by 30%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹240 to ₹276. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹2700 to ₹2295. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹1980 to ₹2277. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹3960 to ₹5940. By what percent did it go up?
  12. 12.A water tank holds 380 litres. 15% of the water is used. How many litres are left?
  13. 13.A shop sells 4060 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹3220 to ₹1610. By what percent did it come down?
  15. 15.A shop sells 1200 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  17. 17.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 2480 litres. 10% of the water is used. How many litres are left?
  19. 19.A water tank holds 800 litres. 40% of the water is used. How many litres are left?
  20. 20.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  21. 21.The price of a bicycle is ₹1380. It goes up by 40%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹1020 to ₹1173. By what percent did it go up?
  23. 23.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A town has 1700 people. Its population grows by 25%. How many people live there now?
  25. 25.A water tank holds 4260 litres. 25% of the water is used. How many litres are left?
  26. 26.A shop sells 4760 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  27. 27.The price of a bicycle is ₹3940. It goes up by 20%. What is the new price (in ₹)?
  28. 28.A water tank holds 100 litres. 15% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹4800. It goes up by 50%. What is the new price (in ₹)?
  30. 30.A town has 2000 people. Its population grows by 50%. How many people live there now?
  31. 31.The price of a school bag changes from ₹4120 to ₹5150. By what percent did it go up?
  32. 32.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  33. 33.A shop sells 1200 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  34. 34.A water tank holds 4100 litres. 5% of the water is used. How many litres are left?
  35. 35.A shop sells 2340 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  36. 36.A town has 3280 people. Its population grows by 50%. How many people live there now?
  37. 37.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  38. 38.The price of a school bag changes from ₹3160 to ₹3002. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹3900 to ₹4680. By what percent did it go up?
  40. 40.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 24
  2. 50
  3. 68
  4. 1620
  5. 4700
  6. 6200
  7. 3042
  8. 15
  9. 15
  10. 15
  11. 50
  12. 323
  13. 4669
  14. 50
  15. 1320
  16. 19.25
  17. 95
  18. 2232
  19. 480
  20. 12
  21. 1932
  22. 15
  23. 75
  24. 2125
  25. 3195
  26. 5950
  27. 4728
  28. 85
  29. 7200
  30. 3000
  31. 25
  32. 57.5
  33. 1380
  34. 3895
  35. 2574
  36. 4920
  37. 62.5
  38. 5
  39. 20
  40. 65

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