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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 381 · 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 bicycle is ₹920. It goes up by 5%. What is the new price (in ₹)?
  2. 2.A water tank holds 3200 litres. 25% of the water is used. How many litres are left?
  3. 3.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  4. 4.The price of a bicycle is ₹1420. It goes up by 20%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹920. It goes up by 15%. What is the new price (in ₹)?
  6. 6.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  7. 7.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 420 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 3460 litres. 5% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹1120. It goes up by 30%. What is the new price (in ₹)?
  11. 11.A water tank holds 4920 litres. 30% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹1440 to ₹1584. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹2760 to ₹3174. By what percent did it go up?
  14. 14.A water tank holds 1840 litres. 30% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹4200 to ₹4620. By what percent did it go up?
  16. 16.A water tank holds 940 litres. 40% of the water is used. How many litres are left?
  17. 17.A water tank holds 1100 litres. 10% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹280 to ₹336. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹840 to ₹756. By what percent did it come down?
  20. 20.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹80 to ₹96. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹4620 to ₹4851. By what percent did it go up?
  23. 23.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  24. 24.A water tank holds 4620 litres. 15% of the water is used. How many litres are left?
  25. 25.A water tank holds 1320 litres. 5% of the water is used. How many litres are left?
  26. 26.A town has 1320 people. Its population grows by 5%. How many people live there now?
  27. 27.The price of a school bag changes from ₹4760 to ₹3808. By what percent did it come down?
  28. 28.A shop sells 400 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  29. 29.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  30. 30.The price of a bicycle is ₹1340. It goes up by 5%. What is the new price (in ₹)?
  31. 31.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  32. 32.A water tank holds 340 litres. 50% of the water is used. How many litres are left?
  33. 33.A water tank holds 1160 litres. 40% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹380. It goes up by 20%. What is the new price (in ₹)?
  35. 35.A town has 3780 people. Its population grows by 30%. How many people live there now?
  36. 36.A town has 3940 people. Its population grows by 30%. How many people live there now?
  37. 37.The price of a bicycle is ₹2960. It goes up by 20%. What is the new price (in ₹)?
  38. 38.A shop sells 1120 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  39. 39.A shop sells 2840 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  40. 40.A water tank holds 3600 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 966
  2. 2400
  3. 62.5
  4. 1704
  5. 1058
  6. 56
  7. 36.5
  8. 399
  9. 3287
  10. 1456
  11. 3444
  12. 10
  13. 15
  14. 1288
  15. 10
  16. 564
  17. 990
  18. 20
  19. 10
  20. 43.75
  21. 20
  22. 5
  23. 9.75
  24. 3927
  25. 1254
  26. 1386
  27. 20
  28. 480
  29. 23.5
  30. 1407
  31. 33.5
  32. 170
  33. 696
  34. 456
  35. 4914
  36. 5122
  37. 3552
  38. 1232
  39. 3124
  40. 3420

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