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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 68 · 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 3360 litres. 50% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹4840 to ₹6776. By what percent did it go up?
  3. 3.The price of a bicycle is ₹1820. It goes up by 15%. What is the new price (in ₹)?
  4. 4.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  5. 5.A shop sells 380 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  6. 6.A water tank holds 3300 litres. 5% of the water is used. How many litres are left?
  7. 7.A water tank holds 3880 litres. 30% of the water is used. How many litres are left?
  8. 8.A shop sells 2320 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  9. 9.The price of a bicycle is ₹1040. It goes up by 50%. What is the new price (in ₹)?
  10. 10.A water tank holds 3340 litres. 40% of the water is used. How many litres are left?
  11. 11.A town has 1360 people. Its population grows by 15%. How many people live there now?
  12. 12.A water tank holds 4140 litres. 10% of the water is used. How many litres are left?
  13. 13.A town has 2380 people. Its population grows by 30%. How many people live there now?
  14. 14.The price of a school bag changes from ₹1560 to ₹1638. By what percent did it go up?
  15. 15.A water tank holds 4260 litres. 30% of the water is used. How many litres are left?
  16. 16.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  17. 17.A town has 620 people. Its population grows by 30%. How many people live there now?
  18. 18.A water tank holds 100 litres. 5% of the water is used. How many litres are left?
  19. 19.A water tank holds 3320 litres. 50% of the water is used. How many litres are left?
  20. 20.A water tank holds 3420 litres. 10% of the water is used. How many litres are left?
  21. 21.A water tank holds 4880 litres. 10% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹3260 to ₹2934. By what percent did it come down?
  23. 23.The price of a bicycle is ₹3260. It goes up by 50%. What is the new price (in ₹)?
  24. 24.The price of a bicycle is ₹3060. It goes up by 20%. What is the new price (in ₹)?
  25. 25.A town has 4340 people. Its population grows by 15%. How many people live there now?
  26. 26.A water tank holds 180 litres. 40% of the water is used. How many litres are left?
  27. 27.A shop sells 3900 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  28. 28.The price of a school bag changes from ₹3860 to ₹4825. By what percent did it go up?
  29. 29.A water tank holds 4100 litres. 30% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹1620. It goes up by 40%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹3860 to ₹5404. By what percent did it go up?
  32. 32.A water tank holds 4540 litres. 20% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹980 to ₹1225. By what percent did it go up?
  34. 34.A water tank holds 80 litres. 5% of the water is used. How many litres are left?
  35. 35.A town has 1200 people. Its population grows by 10%. How many people live there now?
  36. 36.A shop sells 3060 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  37. 37.The price of a bicycle is ₹2160. It goes up by 50%. What is the new price (in ₹)?
  38. 38.The price of a school bag changes from ₹3100 to ₹2325. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹4840 to ₹5324. By what percent did it go up?
  40. 40.A water tank holds 4020 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 1680
  2. 40
  3. 2093
  4. 3.5
  5. 475
  6. 3135
  7. 2716
  8. 2784
  9. 1560
  10. 2004
  11. 1564
  12. 3726
  13. 3094
  14. 5
  15. 2982
  16. 69
  17. 806
  18. 95
  19. 1660
  20. 3078
  21. 4392
  22. 10
  23. 4890
  24. 3672
  25. 4991
  26. 108
  27. 4875
  28. 25
  29. 2870
  30. 2268
  31. 40
  32. 3632
  33. 25
  34. 76
  35. 1320
  36. 3672
  37. 3240
  38. 25
  39. 10
  40. 3216

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