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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 973 · 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 15% and then comes down by 15% more. By what percent has it come down in all? =
  2. 2.A water tank holds 120 litres. 50% of the water is used. How many litres are left?
  3. 3.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  4. 4.A town has 1460 people. Its population grows by 20%. How many people live there now?
  5. 5.A water tank holds 3140 litres. 20% of the water is used. How many litres are left?
  6. 6.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  7. 7.A water tank holds 2480 litres. 20% of the water is used. How many litres are left?
  8. 8.The price of a bicycle is ₹3140. It goes up by 5%. What is the new price (in ₹)?
  9. 9.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  10. 10.A water tank holds 3680 litres. 10% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹3500. It goes up by 40%. What is the new price (in ₹)?
  12. 12.A shop sells 2120 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  13. 13.The price of a school bag changes from ₹3440 to ₹4128. By what percent did it go up?
  14. 14.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  15. 15.A water tank holds 600 litres. 40% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹1960. It goes up by 10%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹3140 to ₹3454. By what percent did it go up?
  18. 18.A shop sells 4080 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  19. 19.A shop sells 3920 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  20. 20.A shop sells 1340 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  21. 21.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  22. 22.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 980 litres. 10% of the water is used. How many litres are left?
  24. 24.A water tank holds 3960 litres. 50% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹340. It goes up by 15%. What is the new price (in ₹)?
  26. 26.A water tank holds 3440 litres. 10% of the water is used. How many litres are left?
  27. 27.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  28. 28.A water tank holds 160 litres. 30% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹3360 to ₹3864. By what percent did it go up?
  30. 30.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹3780 to ₹3969. By what percent did it go up?
  32. 32.A town has 460 people. Its population grows by 25%. How many people live there now?
  33. 33.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹4700 to ₹4465. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹900 to ₹1350. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹2660 to ₹2926. By what percent did it go up?
  37. 37.A shop sells 1460 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  38. 38.A water tank holds 2180 litres. 20% of the water is used. How many litres are left?
  39. 39.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹3580 to ₹3222. By what percent did it come down?

Answer key

  1. 27.75
  2. 60
  3. 35
  4. 1752
  5. 2512
  6. 8
  7. 1984
  8. 3297
  9. 55
  10. 3312
  11. 4900
  12. 2332
  13. 20
  14. 23.5
  15. 360
  16. 2156
  17. 10
  18. 5712
  19. 5488
  20. 1407
  21. 110
  22. 61
  23. 882
  24. 1980
  25. 391
  26. 3096
  27. 32.5
  28. 112
  29. 15
  30. 3.5
  31. 5
  32. 575
  33. 51
  34. 5
  35. 50
  36. 10
  37. 1825
  38. 1744
  39. 56
  40. 10

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