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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 451 · 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 2700 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹3680. It goes up by 10%. What is the new price (in ₹)?
  3. 3.A shop sells 4320 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  4. 4.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  5. 5.A shop sells 1300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  6. 6.A shop sells 2960 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  7. 7.A water tank holds 2140 litres. 10% of the water is used. How many litres are left?
  8. 8.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  9. 9.A shop sells 3960 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  10. 10.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  11. 11.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  12. 12.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  13. 13.A water tank holds 4920 litres. 10% of the water is used. How many litres are left?
  14. 14.A water tank holds 600 litres. 50% of the water is used. How many litres are left?
  15. 15.A water tank holds 440 litres. 5% of the water is used. How many litres are left?
  16. 16.A water tank holds 2040 litres. 30% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3960 to ₹4950. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹2620 to ₹3013. By what percent did it go up?
  19. 19.The price of a bicycle is ₹3320. It goes up by 10%. What is the new price (in ₹)?
  20. 20.A water tank holds 3620 litres. 25% of the water is used. How many litres are left?
  21. 21.A water tank holds 1620 litres. 30% of the water is used. How many litres are left?
  22. 22.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  23. 23.The price of a school bag changes from ₹2840 to ₹2556. By what percent did it come down?
  24. 24.A town has 4320 people. Its population grows by 10%. How many people live there now?
  25. 25.The price of a school bag changes from ₹3700 to ₹4625. By what percent did it go up?
  26. 26.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹160 to ₹184. By what percent did it go up?
  28. 28.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  29. 29.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  30. 30.A shop sells 860 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  31. 31.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  32. 32.A water tank holds 980 litres. 10% of the water is used. How many litres are left?
  33. 33.A shop sells 2420 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹440 to ₹462. By what percent did it go up?
  35. 35.A town has 3760 people. Its population grows by 20%. How many people live there now?
  36. 36.A water tank holds 1080 litres. 40% of the water is used. How many litres are left?
  37. 37.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  38. 38.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 1580 litres. 20% of the water is used. How many litres are left?
  40. 40.A shop sells 4300 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?

Answer key

  1. 2160
  2. 4048
  3. 6048
  4. 40
  5. 1690
  6. 3256
  7. 1926
  8. 19
  9. 4356
  10. 2
  11. 46
  12. 33.5
  13. 4428
  14. 300
  15. 418
  16. 1428
  17. 25
  18. 15
  19. 3652
  20. 2715
  21. 1134
  22. 19.25
  23. 10
  24. 4752
  25. 25
  26. 14.5
  27. 15
  28. 72.5
  29. 55
  30. 989
  31. 37
  32. 882
  33. 3388
  34. 5
  35. 4512
  36. 648
  37. 47.5
  38. 68
  39. 1264
  40. 6450

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