← Percentage increase and decrease lesson New set →

Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 437 · 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 town has 820 people. Its population grows by 15%. How many people live there now?
  2. 2.A water tank holds 2620 litres. 20% of the water is used. How many litres are left?
  3. 3.A water tank holds 4580 litres. 50% of the water is used. How many litres are left?
  4. 4.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  5. 5.A town has 780 people. Its population grows by 50%. How many people live there now?
  6. 6.The price of a bicycle is ₹3540. It goes up by 10%. What is the new price (in ₹)?
  7. 7.The price of a school bag changes from ₹1380 to ₹1656. By what percent did it go up?
  8. 8.The price of a bicycle is ₹1720. It goes up by 30%. What is the new price (in ₹)?
  9. 9.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹1300. It goes up by 5%. What is the new price (in ₹)?
  11. 11.A water tank holds 1020 litres. 10% of the water is used. How many litres are left?
  12. 12.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  13. 13.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  14. 14.A town has 2920 people. Its population grows by 15%. How many people live there now?
  15. 15.A water tank holds 2920 litres. 10% of the water is used. How many litres are left?
  16. 16.A town has 3020 people. Its population grows by 25%. How many people live there now?
  17. 17.A town has 1140 people. Its population grows by 50%. How many people live there now?
  18. 18.The price of a school bag changes from ₹1500 to ₹1050. By what percent did it come down?
  19. 19.The price of a bicycle is ₹620. It goes up by 5%. What is the new price (in ₹)?
  20. 20.A shop sells 1060 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  21. 21.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹2920 to ₹3358. By what percent did it go up?
  23. 23.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.The price of a school bag changes from ₹3160 to ₹3634. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹1180 to ₹826. By what percent did it come down?
  26. 26.The price of a school bag changes from ₹1220 to ₹1403. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹4520 to ₹5198. By what percent did it go up?
  28. 28.The price of a bicycle is ₹1460. It goes up by 15%. What is the new price (in ₹)?
  29. 29.A water tank holds 1160 litres. 20% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1120 to ₹1232. By what percent did it go up?
  31. 31.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  32. 32.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  33. 33.The price of a school bag changes from ₹740 to ₹666. By what percent did it come down?
  34. 34.A shop sells 4960 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  35. 35.The price of a bicycle is ₹2600. It goes up by 10%. What is the new price (in ₹)?
  36. 36.A water tank holds 4000 litres. 25% of the water is used. How many litres are left?
  37. 37.A town has 120 people. Its population grows by 50%. How many people live there now?
  38. 38.A shop sells 560 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  39. 39.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.The price of a bicycle is ₹780. It goes up by 5%. What is the new price (in ₹)?

Answer key

  1. 943
  2. 2096
  3. 2290
  4. 32
  5. 1170
  6. 3894
  7. 20
  8. 2236
  9. 56.25
  10. 1365
  11. 918
  12. 5
  13. 19
  14. 3358
  15. 2628
  16. 3775
  17. 1710
  18. 30
  19. 651
  20. 1484
  21. 75
  22. 15
  23. 37.5
  24. 15
  25. 30
  26. 15
  27. 15
  28. 1679
  29. 928
  30. 10
  31. 43.75
  32. 55
  33. 10
  34. 5952
  35. 2860
  36. 3000
  37. 180
  38. 700
  39. 61
  40. 819

Free quantitative aptitude lessons, practice and worksheets at talentjr.in/quantitative-aptitude