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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 612 · 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 ₹900 to ₹1080. By what percent did it go up?
  2. 2.A water tank holds 3180 litres. 50% of the water is used. How many litres are left?
  3. 3.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 2460 litres. 10% of the water is used. How many litres are left?
  5. 5.A water tank holds 1500 litres. 10% of the water is used. How many litres are left?
  6. 6.A shop sells 880 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  7. 7.The price of a school bag changes from ₹4160 to ₹4784. By what percent did it go up?
  8. 8.The price of a school bag changes from ₹280 to ₹238. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹3080 to ₹4312. By what percent did it go up?
  10. 10.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹140 to ₹126. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹3500 to ₹3850. By what percent did it go up?
  13. 13.A water tank holds 1340 litres. 25% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹3760 to ₹4324. By what percent did it go up?
  15. 15.A town has 500 people. Its population grows by 20%. How many people live there now?
  16. 16.The price of a school bag changes from ₹1340 to ₹2010. By what percent did it go up?
  17. 17.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  18. 18.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  19. 19.The price of a bicycle is ₹1380. It goes up by 10%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹620 to ₹465. By what percent did it come down?
  21. 21.A water tank holds 4900 litres. 30% of the water is used. How many litres are left?
  22. 22.A water tank holds 2960 litres. 25% of the water is used. How many litres are left?
  23. 23.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  24. 24.A town has 1800 people. Its population grows by 20%. How many people live there now?
  25. 25.A water tank holds 1540 litres. 15% of the water is used. How many litres are left?
  26. 26.A shop sells 4620 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  27. 27.A water tank holds 2920 litres. 40% of the water is used. How many litres are left?
  28. 28.A water tank holds 2540 litres. 20% of the water is used. How many litres are left?
  29. 29.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  30. 30.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  31. 31.The price of a bicycle is ₹1140. It goes up by 5%. What is the new price (in ₹)?
  32. 32.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A water tank holds 1320 litres. 5% of the water is used. How many litres are left?
  34. 34.A water tank holds 500 litres. 5% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹1960. It goes up by 20%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹1980 to ₹2970. By what percent did it go up?
  37. 37.A water tank holds 200 litres. 25% of the water is used. How many litres are left?
  38. 38.A town has 80 people. Its population grows by 15%. How many people live there now?
  39. 39.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  40. 40.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 20
  2. 1590
  3. 43.75
  4. 2214
  5. 1350
  6. 968
  7. 15
  8. 15
  9. 40
  10. 82
  11. 10
  12. 10
  13. 1005
  14. 15
  15. 600
  16. 50
  17. 28
  18. 14.5
  19. 1518
  20. 25
  21. 3430
  22. 2220
  23. 54
  24. 2160
  25. 1309
  26. 4851
  27. 1752
  28. 2032
  29. 31.25
  30. 70
  31. 1197
  32. 43
  33. 1254
  34. 475
  35. 2352
  36. 50
  37. 150
  38. 92
  39. 56.25
  40. 32.5

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