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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 332 · 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 price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  2. 2.A water tank holds 1180 litres. 10% of the water is used. How many litres are left?
  3. 3.The price of a bicycle is ₹1140. It goes up by 50%. What is the new price (in ₹)?
  4. 4.A town has 4100 people. Its population grows by 30%. How many people live there now?
  5. 5.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  6. 6.A town has 3420 people. Its population grows by 30%. How many people live there now?
  7. 7.The price of a school bag changes from ₹1000 to ₹1050. By what percent did it go up?
  8. 8.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  9. 9.A shop sells 2760 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  10. 10.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  11. 11.A water tank holds 2880 litres. 15% of the water is used. How many litres are left?
  12. 12.A town has 3280 people. Its population grows by 10%. How many people live there now?
  13. 13.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  14. 14.A shop sells 2640 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  15. 15.The price of a bicycle is ₹4420. It goes up by 40%. What is the new price (in ₹)?
  16. 16.The price of a bicycle is ₹2140. It goes up by 5%. What is the new price (in ₹)?
  17. 17.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹980 to ₹931. By what percent did it come down?
  19. 19.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  20. 20.The price of a bicycle is ₹1000. It goes up by 25%. What is the new price (in ₹)?
  21. 21.A water tank holds 1820 litres. 15% of the water is used. How many litres are left?
  22. 22.A water tank holds 900 litres. 15% of the water is used. How many litres are left?
  23. 23.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  24. 24.A water tank holds 3100 litres. 10% of the water is used. How many litres are left?
  25. 25.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  26. 26.The price of a school bag changes from ₹1640 to ₹1558. By what percent did it come down?
  27. 27.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  28. 28.A water tank holds 3440 litres. 30% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹1840 to ₹1748. By what percent did it come down?
  30. 30.A town has 1220 people. Its population grows by 40%. How many people live there now?
  31. 31.A shop sells 2620 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  32. 32.The price of a bicycle is ₹2900. It goes up by 10%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹1500 to ₹1650. By what percent did it go up?
  34. 34.A water tank holds 680 litres. 50% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹4740 to ₹5925. By what percent did it go up?
  36. 36.A water tank holds 300 litres. 5% of the water is used. How many litres are left?
  37. 37.A town has 1120 people. Its population grows by 20%. How many people live there now?
  38. 38.The price of a bicycle is ₹2360. It goes up by 5%. What is the new price (in ₹)?
  39. 39.A shop sells 4020 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹2460 to ₹1230. By what percent did it come down?

Answer key

  1. 17
  2. 1062
  3. 1710
  4. 5330
  5. 38
  6. 4446
  7. 5
  8. 15.5
  9. 4140
  10. 27.5
  11. 2448
  12. 3608
  13. 10.25
  14. 3696
  15. 6188
  16. 2247
  17. 72.5
  18. 5
  19. 23.5
  20. 1250
  21. 1547
  22. 765
  23. 60
  24. 2790
  25. 52.5
  26. 5
  27. 18.75
  28. 2408
  29. 5
  30. 1708
  31. 3013
  32. 3190
  33. 10
  34. 340
  35. 25
  36. 285
  37. 1344
  38. 2478
  39. 5226
  40. 50

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