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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 577 · 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 2840 litres. 5% of the water is used. How many litres are left?
  2. 2.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹3960 to ₹2772. By what percent did it come down?
  4. 4.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  5. 5.A water tank holds 4000 litres. 5% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹2180 to ₹2398. By what percent did it go up?
  7. 7.A town has 3100 people. Its population grows by 5%. How many people live there now?
  8. 8.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  9. 9.A water tank holds 4160 litres. 20% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1980 to ₹2970. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹1240 to ₹1550. By what percent did it go up?
  12. 12.A water tank holds 2600 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2340 to ₹2223. By what percent did it come down?
  14. 14.The price of a bicycle is ₹3800. It goes up by 50%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹2580. It goes up by 15%. What is the new price (in ₹)?
  16. 16.A town has 200 people. Its population grows by 5%. How many people live there now?
  17. 17.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  18. 18.A water tank holds 180 litres. 30% of the water is used. How many litres are left?
  19. 19.A town has 940 people. Its population grows by 40%. How many people live there now?
  20. 20.The price of a school bag changes from ₹2860 to ₹3146. By what percent did it go up?
  21. 21.A town has 980 people. Its population grows by 10%. How many people live there now?
  22. 22.The price of a school bag changes from ₹4040 to ₹4242. By what percent did it go up?
  23. 23.A water tank holds 3460 litres. 15% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹960 to ₹1440. By what percent did it go up?
  25. 25.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  26. 26.A shop sells 1880 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  27. 27.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  28. 28.The price of a bicycle is ₹1480. It goes up by 30%. What is the new price (in ₹)?
  29. 29.A water tank holds 2400 litres. 50% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1540 to ₹1925. By what percent did it go up?
  31. 31.A water tank holds 4940 litres. 5% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹200 to ₹170. By what percent did it come down?
  33. 33.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  34. 34.A water tank holds 140 litres. 40% of the water is used. How many litres are left?
  35. 35.A water tank holds 4240 litres. 30% of the water is used. How many litres are left?
  36. 36.A town has 3160 people. Its population grows by 10%. How many people live there now?
  37. 37.A town has 340 people. Its population grows by 40%. How many people live there now?
  38. 38.A town has 4660 people. Its population grows by 10%. How many people live there now?
  39. 39.A water tank holds 3980 litres. 10% of the water is used. How many litres are left?
  40. 40.A shop sells 1620 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?

Answer key

  1. 2698
  2. 52.5
  3. 30
  4. 54
  5. 3800
  6. 10
  7. 3255
  8. 65
  9. 3328
  10. 50
  11. 25
  12. 2470
  13. 5
  14. 5700
  15. 2967
  16. 210
  17. 49
  18. 126
  19. 1316
  20. 10
  21. 1078
  22. 5
  23. 2941
  24. 50
  25. 57.5
  26. 1974
  27. 26
  28. 1924
  29. 1200
  30. 25
  31. 4693
  32. 15
  33. 14
  34. 84
  35. 2968
  36. 3476
  37. 476
  38. 5126
  39. 3582
  40. 1863

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