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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 396 · 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 shop sells 2940 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  2. 2.A water tank holds 2640 litres. 20% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹1500 to ₹1650. By what percent did it go up?
  4. 4.The price of a bicycle is ₹3820. It goes up by 25%. What is the new price (in ₹)?
  5. 5.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 4000 litres. 15% of the water is used. How many litres are left?
  7. 7.A shop sells 2120 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.The price of a school bag changes from ₹1300 to ₹1820. By what percent did it go up?
  9. 9.A water tank holds 3800 litres. 25% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹2580 to ₹2322. By what percent did it come down?
  11. 11.A water tank holds 1440 litres. 40% of the water is used. How many litres are left?
  12. 12.A water tank holds 600 litres. 5% of the water is used. How many litres are left?
  13. 13.A water tank holds 3520 litres. 10% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹2860 to ₹2288. By what percent did it come down?
  15. 15.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹3400 to ₹4760. By what percent did it go up?
  17. 17.A shop sells 4880 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  18. 18.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  19. 19.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  20. 20.A shop sells 2160 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  21. 21.The price of a bicycle is ₹2360. It goes up by 5%. What is the new price (in ₹)?
  22. 22.A water tank holds 3360 litres. 5% of the water is used. How many litres are left?
  23. 23.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹1200 to ₹600. By what percent did it come down?
  25. 25.A water tank holds 3880 litres. 50% of the water is used. How many litres are left?
  26. 26.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹1020 to ₹1122. By what percent did it go up?
  28. 28.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  29. 29.A town has 1860 people. Its population grows by 30%. How many people live there now?
  30. 30.A water tank holds 2880 litres. 25% of the water is used. How many litres are left?
  31. 31.A water tank holds 1700 litres. 30% of the water is used. How many litres are left?
  32. 32.A town has 4780 people. Its population grows by 5%. How many people live there now?
  33. 33.A town has 2380 people. Its population grows by 10%. How many people live there now?
  34. 34.A water tank holds 940 litres. 5% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹1000 to ₹850. By what percent did it come down?
  36. 36.A town has 440 people. Its population grows by 50%. How many people live there now?
  37. 37.The price of a school bag changes from ₹2940 to ₹3675. By what percent did it go up?
  38. 38.The price of a bicycle is ₹2520. It goes up by 25%. What is the new price (in ₹)?
  39. 39.A water tank holds 2220 litres. 25% of the water is used. How many litres are left?
  40. 40.A water tank holds 1380 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 3381
  2. 2112
  3. 10
  4. 4775
  5. 75
  6. 3400
  7. 2226
  8. 40
  9. 2850
  10. 10
  11. 864
  12. 570
  13. 3168
  14. 20
  15. 38
  16. 40
  17. 5612
  18. 52
  19. 65
  20. 2592
  21. 2478
  22. 3192
  23. 52.5
  24. 50
  25. 1940
  26. 28
  27. 10
  28. 9.75
  29. 2418
  30. 2160
  31. 1190
  32. 5019
  33. 2618
  34. 893
  35. 15
  36. 660
  37. 25
  38. 3150
  39. 1665
  40. 690

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