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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 930 · 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 ₹4300 to ₹2580. By what percent did it come down?
  2. 2.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  3. 3.A water tank holds 2860 litres. 30% of the water is used. How many litres are left?
  4. 4.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  5. 5.A town has 3840 people. Its population grows by 30%. How many people live there now?
  6. 6.A water tank holds 960 litres. 20% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹4520 to ₹3164. By what percent did it come down?
  8. 8.A water tank holds 1620 litres. 20% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹3000 to ₹1800. By what percent did it come down?
  10. 10.A water tank holds 4640 litres. 10% of the water is used. How many litres are left?
  11. 11.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  12. 12.A shop sells 3080 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 2860 litres. 5% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹2120 to ₹1696. By what percent did it come down?
  15. 15.A water tank holds 2420 litres. 25% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹1980 to ₹2772. By what percent did it go up?
  17. 17.A shop sells 1220 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  18. 18.A shop sells 680 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹3820 to ₹3438. By what percent did it come down?
  20. 20.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  21. 21.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹3100 to ₹3875. By what percent did it go up?
  23. 23.The price of a bicycle is ₹4620. It goes up by 5%. What is the new price (in ₹)?
  24. 24.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹800 to ₹1200. By what percent did it go up?
  26. 26.A water tank holds 1320 litres. 30% of the water is used. How many litres are left?
  27. 27.A water tank holds 180 litres. 5% of the water is used. How many litres are left?
  28. 28.A water tank holds 4600 litres. 15% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹3980 to ₹3582. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹1800 to ₹2160. By what percent did it go up?
  31. 31.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  32. 32.A water tank holds 240 litres. 50% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹4760. It goes up by 50%. What is the new price (in ₹)?
  34. 34.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹2160. It goes up by 30%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹920 to ₹1012. By what percent did it go up?
  37. 37.A town has 980 people. Its population grows by 50%. How many people live there now?
  38. 38.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  39. 39.A shop sells 1400 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹1160 to ₹696. By what percent did it come down?

Answer key

  1. 40
  2. 28
  3. 2002
  4. 56
  5. 4992
  6. 768
  7. 30
  8. 1296
  9. 40
  10. 4176
  11. 61
  12. 3696
  13. 2717
  14. 20
  15. 1815
  16. 40
  17. 1586
  18. 850
  19. 10
  20. 44
  21. 75
  22. 25
  23. 4851
  24. 35
  25. 50
  26. 924
  27. 171
  28. 3910
  29. 10
  30. 20
  31. 52
  32. 120
  33. 7140
  34. 28
  35. 2808
  36. 10
  37. 1470
  38. 43
  39. 1540
  40. 40

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