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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 898 · 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 2760 litres. 15% of the water is used. How many litres are left?
  2. 2.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  3. 3.A town has 640 people. Its population grows by 50%. How many people live there now?
  4. 4.A water tank holds 2760 litres. 5% of the water is used. How many litres are left?
  5. 5.A water tank holds 4840 litres. 25% of the water is used. How many litres are left?
  6. 6.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹3840 to ₹4416. By what percent did it go up?
  8. 8.A water tank holds 1100 litres. 25% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹4860 to ₹3645. By what percent did it come down?
  10. 10.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 3780 litres. 25% of the water is used. How many litres are left?
  12. 12.A water tank holds 1920 litres. 25% of the water is used. How many litres are left?
  13. 13.A water tank holds 920 litres. 20% of the water is used. How many litres are left?
  14. 14.A water tank holds 740 litres. 40% of the water is used. How many litres are left?
  15. 15.The price of a bicycle is ₹1980. It goes up by 20%. What is the new price (in ₹)?
  16. 16.A shop sells 1660 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  17. 17.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  18. 18.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹1040 to ₹988. By what percent did it come down?
  20. 20.A water tank holds 3400 litres. 10% of the water is used. How many litres are left?
  21. 21.A town has 2980 people. Its population grows by 50%. How many people live there now?
  22. 22.A water tank holds 4940 litres. 50% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹1160 to ₹1392. By what percent did it go up?
  24. 24.A water tank holds 560 litres. 15% of the water is used. How many litres are left?
  25. 25.A water tank holds 4220 litres. 50% of the water is used. How many litres are left?
  26. 26.A town has 1460 people. Its population grows by 25%. How many people live there now?
  27. 27.A water tank holds 2120 litres. 50% of the water is used. How many litres are left?
  28. 28.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹1700 to ₹1785. By what percent did it go up?
  30. 30.A water tank holds 2400 litres. 25% of the water is used. How many litres are left?
  31. 31.A town has 3320 people. Its population grows by 15%. How many people live there now?
  32. 32.A water tank holds 4140 litres. 10% of the water is used. How many litres are left?
  33. 33.A water tank holds 2140 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹1140. It goes up by 40%. What is the new price (in ₹)?
  35. 35.A water tank holds 1180 litres. 10% of the water is used. How many litres are left?
  36. 36.A town has 4680 people. Its population grows by 30%. How many people live there now?
  37. 37.The price of a school bag changes from ₹1640 to ₹1722. By what percent did it go up?
  38. 38.The price of a bicycle is ₹2540. It goes up by 15%. What is the new price (in ₹)?
  39. 39.The price of a bicycle is ₹4440. It goes up by 25%. What is the new price (in ₹)?
  40. 40.A shop sells 220 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?

Answer key

  1. 2346
  2. 14
  3. 960
  4. 2622
  5. 3630
  6. 43
  7. 15
  8. 825
  9. 25
  10. 80
  11. 2835
  12. 1440
  13. 736
  14. 444
  15. 2376
  16. 2324
  17. 20
  18. 2
  19. 5
  20. 3060
  21. 4470
  22. 2470
  23. 20
  24. 476
  25. 2110
  26. 1825
  27. 1060
  28. 55
  29. 5
  30. 1800
  31. 3818
  32. 3726
  33. 1605
  34. 1596
  35. 1062
  36. 6084
  37. 5
  38. 2921
  39. 5550
  40. 330

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