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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 774 · 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 2560 people. Its population grows by 5%. How many people live there now?
  2. 2.A town has 4800 people. Its population grows by 10%. How many people live there now?
  3. 3.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  4. 4.A shop sells 4500 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  5. 5.A shop sells 3400 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  6. 6.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹4160 to ₹3120. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹1500 to ₹1050. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹500 to ₹550. By what percent did it go up?
  10. 10.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  11. 11.The price of a bicycle is ₹2300. It goes up by 5%. What is the new price (in ₹)?
  12. 12.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹4200 to ₹3780. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹960 to ₹720. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹620 to ₹930. By what percent did it go up?
  16. 16.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  17. 17.A water tank holds 1000 litres. 10% of the water is used. How many litres are left?
  18. 18.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  19. 19.A water tank holds 2660 litres. 20% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹1980 to ₹1386. By what percent did it come down?
  21. 21.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹1960 to ₹1862. By what percent did it come down?
  23. 23.The price of a bicycle is ₹4780. It goes up by 15%. What is the new price (in ₹)?
  24. 24.A water tank holds 3940 litres. 25% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹4540. It goes up by 15%. What is the new price (in ₹)?
  26. 26.The price of a bicycle is ₹920. It goes up by 10%. What is the new price (in ₹)?
  27. 27.A water tank holds 2380 litres. 25% of the water is used. How many litres are left?
  28. 28.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  29. 29.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  30. 30.A town has 1900 people. Its population grows by 50%. How many people live there now?
  31. 31.The price of a school bag changes from ₹3420 to ₹3249. By what percent did it come down?
  32. 32.A water tank holds 340 litres. 20% of the water is used. How many litres are left?
  33. 33.A water tank holds 1100 litres. 15% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹2960 to ₹2516. By what percent did it come down?
  35. 35.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 380 litres. 25% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹620 to ₹713. By what percent did it go up?
  38. 38.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  39. 39.A shop sells 4560 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  40. 40.The price of a bicycle is ₹4500. It goes up by 40%. What is the new price (in ₹)?

Answer key

  1. 2688
  2. 5280
  3. 38
  4. 5625
  5. 3570
  6. 62.5
  7. 25
  8. 30
  9. 10
  10. 69
  11. 2415
  12. 47
  13. 10
  14. 25
  15. 50
  16. 35
  17. 900
  18. 6.25
  19. 2128
  20. 30
  21. 14.5
  22. 5
  23. 5497
  24. 2955
  25. 5221
  26. 1012
  27. 1785
  28. 75
  29. 37
  30. 2850
  31. 5
  32. 272
  33. 935
  34. 15
  35. 49.5
  36. 285
  37. 15
  38. 43
  39. 5472
  40. 6300

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