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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 837 · 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 1380 litres. 50% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2800 to ₹2940. By what percent did it go up?
  3. 3.A water tank holds 580 litres. 15% of the water is used. How many litres are left?
  4. 4.A water tank holds 3120 litres. 30% of the water is used. How many litres are left?
  5. 5.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹3520 to ₹2640. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹4060 to ₹3248. By what percent did it come down?
  8. 8.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  9. 9.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  10. 10.A water tank holds 940 litres. 20% of the water is used. How many litres are left?
  11. 11.A water tank holds 4020 litres. 50% of the water is used. How many litres are left?
  12. 12.A town has 1320 people. Its population grows by 10%. How many people live there now?
  13. 13.A shop sells 2840 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  14. 14.A water tank holds 4140 litres. 30% of the water is used. How many litres are left?
  15. 15.A water tank holds 4940 litres. 5% of the water is used. How many litres are left?
  16. 16.A shop sells 2420 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹680 to ₹782. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹680 to ₹952. By what percent did it go up?
  19. 19.A water tank holds 4740 litres. 10% of the water is used. How many litres are left?
  20. 20.A water tank holds 4280 litres. 5% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹240. It goes up by 50%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹1040 to ₹1092. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹3260 to ₹4890. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹2420 to ₹1694. By what percent did it come down?
  25. 25.A water tank holds 2120 litres. 25% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹3740 to ₹4675. By what percent did it go up?
  27. 27.A water tank holds 1980 litres. 50% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹4960. It goes up by 30%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹3240 to ₹4536. By what percent did it go up?
  30. 30.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 3380 litres. 5% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹2620 to ₹3668. By what percent did it go up?
  33. 33.A water tank holds 360 litres. 25% of the water is used. How many litres are left?
  34. 34.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  35. 35.A town has 3880 people. Its population grows by 5%. How many people live there now?
  36. 36.A shop sells 620 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 school bag changes from ₹3140 to ₹3297. By what percent did it go up?
  38. 38.The price of a school bag changes from ₹500 to ₹550. By what percent did it go up?
  39. 39.A water tank holds 400 litres. 40% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹2620 to ₹2489. By what percent did it come down?

Answer key

  1. 690
  2. 5
  3. 493
  4. 2184
  5. 36.25
  6. 25
  7. 20
  8. 82
  9. 47.5
  10. 752
  11. 2010
  12. 1452
  13. 3408
  14. 2898
  15. 4693
  16. 3388
  17. 15
  18. 40
  19. 4266
  20. 4066
  21. 360
  22. 5
  23. 50
  24. 30
  25. 1590
  26. 25
  27. 990
  28. 6448
  29. 40
  30. 96
  31. 3211
  32. 40
  33. 270
  34. 14.5
  35. 4074
  36. 744
  37. 5
  38. 10
  39. 240
  40. 5

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