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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 54 · 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 10% and then comes down by 10% more. By what percent has it come down in all? =
  2. 2.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹2540 to ₹2413. By what percent did it come down?
  4. 4.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  5. 5.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  6. 6.A water tank holds 3260 litres. 20% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹4720. It goes up by 20%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹3260 to ₹3749. By what percent did it go up?
  9. 9.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  10. 10.A water tank holds 2460 litres. 5% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹3580 to ₹4475. By what percent did it go up?
  12. 12.The price of a bicycle is ₹2820. It goes up by 30%. What is the new price (in ₹)?
  13. 13.The price of a bicycle is ₹860. It goes up by 25%. What is the new price (in ₹)?
  14. 14.The price of a bicycle is ₹1380. It goes up by 10%. What is the new price (in ₹)?
  15. 15.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹3420 to ₹5130. By what percent did it go up?
  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.A shop sells 1620 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  19. 19.A shop sells 720 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  20. 20.A shop sells 4960 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  21. 21.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  22. 22.A water tank holds 1140 litres. 30% of the water is used. How many litres are left?
  23. 23.A shop sells 3920 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  24. 24.The price of a bicycle is ₹3120. It goes up by 40%. What is the new price (in ₹)?
  25. 25.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  26. 26.A town has 740 people. Its population grows by 15%. How many people live there now?
  27. 27.A water tank holds 2400 litres. 50% of the water is used. How many litres are left?
  28. 28.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  29. 29.A town has 2800 people. Its population grows by 30%. How many people live there now?
  30. 30.The price of a school bag changes from ₹4860 to ₹6075. By what percent did it go up?
  31. 31.A town has 1800 people. Its population grows by 50%. How many people live there now?
  32. 32.A water tank holds 2820 litres. 25% of the water is used. How many litres are left?
  33. 33.A shop sells 3400 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹2640 to ₹3960. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹4120 to ₹3090. By what percent did it come down?
  36. 36.A shop sells 100 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹3940 to ₹1970. By what percent did it come down?
  38. 38.A water tank holds 1480 litres. 10% of the water is used. How many litres are left?
  39. 39.A shop sells 3260 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  40. 40.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 19
  2. 52.5
  3. 5
  4. 32.5
  5. 10.5
  6. 2608
  7. 5664
  8. 15
  9. 37
  10. 2337
  11. 25
  12. 3666
  13. 1075
  14. 1518
  15. 2
  16. 50
  17. 43.75
  18. 2430
  19. 900
  20. 5456
  21. 26
  22. 798
  23. 4312
  24. 4368
  25. 65
  26. 851
  27. 1200
  28. 68
  29. 3640
  30. 25
  31. 2700
  32. 2115
  33. 3570
  34. 50
  35. 25
  36. 110
  37. 50
  38. 1332
  39. 3586
  40. 15.5

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