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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 596 · 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 ₹1340 to ₹1474. By what percent did it go up?
  2. 2.A water tank holds 1540 litres. 50% of the water is used. How many litres are left?
  3. 3.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  4. 4.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  5. 5.The price of a school bag changes from ₹4920 to ₹5412. By what percent did it go up?
  6. 6.A water tank holds 2960 litres. 30% of the water is used. How many litres are left?
  7. 7.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  8. 8.A water tank holds 2700 litres. 50% of the water is used. How many litres are left?
  9. 9.A water tank holds 2880 litres. 10% of the water is used. How many litres are left?
  10. 10.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  11. 11.A water tank holds 900 litres. 20% of the water is used. How many litres are left?
  12. 12.A water tank holds 540 litres. 30% of the water is used. How many litres are left?
  13. 13.A town has 1580 people. Its population grows by 40%. How many people live there now?
  14. 14.A water tank holds 4180 litres. 5% of the water is used. How many litres are left?
  15. 15.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  16. 16.A water tank holds 3160 litres. 40% of the water is used. How many litres are left?
  17. 17.A shop sells 4160 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  18. 18.A water tank holds 280 litres. 15% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹1220 to ₹1342. By what percent did it go up?
  20. 20.A town has 2740 people. Its population grows by 50%. How many people live there now?
  21. 21.A shop sells 4680 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹1620 to ₹2430. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹4020 to ₹4221. By what percent did it go up?
  24. 24.A water tank holds 3280 litres. 40% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹1280. It goes up by 5%. What is the new price (in ₹)?
  26. 26.The price of a bicycle is ₹920. It goes up by 25%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹2520 to ₹1512. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹400 to ₹300. By what percent did it come down?
  29. 29.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  30. 30.The price of a school bag changes from ₹1160 to ₹1102. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹2240 to ₹2576. By what percent did it go up?
  32. 32.A water tank holds 2080 litres. 40% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹2280 to ₹2964. By what percent did it go up?
  34. 34.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  35. 35.The price of a school bag changes from ₹4340 to ₹4774. By what percent did it go up?
  36. 36.A shop sells 2240 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  37. 37.A water tank holds 3660 litres. 25% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹4180 to ₹5434. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹1440 to ₹1512. By what percent did it go up?
  40. 40.The price of a bicycle is ₹520. It goes up by 50%. What is the new price (in ₹)?

Answer key

  1. 10
  2. 770
  3. 14
  4. 19
  5. 10
  6. 2072
  7. 47.5
  8. 1350
  9. 2592
  10. 75
  11. 720
  12. 378
  13. 2212
  14. 3971
  15. 17
  16. 1896
  17. 4576
  18. 238
  19. 10
  20. 4110
  21. 6552
  22. 50
  23. 5
  24. 1968
  25. 1344
  26. 1150
  27. 40
  28. 25
  29. 51
  30. 5
  31. 15
  32. 1248
  33. 30
  34. 60
  35. 10
  36. 3360
  37. 2745
  38. 30
  39. 5
  40. 780

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