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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 641 · 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 2380 litres. 5% of the water is used. How many litres are left?
  2. 2.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  3. 3.A shop sells 4020 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  4. 4.A shop sells 3520 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  5. 5.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 1320 litres. 15% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹1180 to ₹1652. By what percent did it go up?
  8. 8.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹4760 to ₹5236. By what percent did it go up?
  10. 10.A shop sells 2060 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  11. 11.A shop sells 1280 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  12. 12.A town has 2960 people. Its population grows by 25%. How many people live there now?
  13. 13.The price of a school bag changes from ₹4040 to ₹6060. By what percent did it go up?
  14. 14.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  15. 15.A water tank holds 1800 litres. 50% of the water is used. How many litres are left?
  16. 16.The price of a bicycle is ₹2360. It goes up by 50%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹1260 to ₹1890. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹3020 to ₹2416. By what percent did it come down?
  19. 19.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 1840 litres. 50% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹3680 to ₹5520. By what percent did it go up?
  22. 22.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹2720 to ₹2584. By what percent did it come down?
  24. 24.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹580 to ₹754. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹1480 to ₹1702. By what percent did it go up?
  27. 27.A shop sells 3300 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  28. 28.A water tank holds 3700 litres. 30% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹4960. It goes up by 30%. What is the new price (in ₹)?
  30. 30.A water tank holds 3740 litres. 25% of the water is used. How many litres are left?
  31. 31.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  32. 32.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  33. 33.The price of a bicycle is ₹1120. It goes up by 5%. What is the new price (in ₹)?
  34. 34.A town has 2600 people. Its population grows by 50%. How many people live there now?
  35. 35.A water tank holds 2780 litres. 30% of the water is used. How many litres are left?
  36. 36.A town has 3480 people. Its population grows by 50%. How many people live there now?
  37. 37.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  38. 38.A water tank holds 540 litres. 5% of the water is used. How many litres are left?
  39. 39.A water tank holds 2380 litres. 10% of the water is used. How many litres are left?
  40. 40.A water tank holds 2620 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 2261
  2. 54
  3. 5025
  4. 4576
  5. 15.5
  6. 1122
  7. 40
  8. 8
  9. 10
  10. 2575
  11. 1408
  12. 3700
  13. 50
  14. 2
  15. 900
  16. 3540
  17. 50
  18. 20
  19. 37.5
  20. 920
  21. 50
  22. 57.5
  23. 5
  24. 23.5
  25. 30
  26. 15
  27. 3630
  28. 2590
  29. 6448
  30. 2805
  31. 20.75
  32. 47.5
  33. 1176
  34. 3900
  35. 1946
  36. 5220
  37. 35
  38. 513
  39. 2142
  40. 2489

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