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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 299 · 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 goes up by 15% more. By what percent has it gone up in all? =
  2. 2.A town has 3920 people. Its population grows by 25%. How many people live there now?
  3. 3.The price of a school bag changes from ₹3020 to ₹3473. By what percent did it go up?
  4. 4.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  5. 5.The price of a school bag changes from ₹380 to ₹323. By what percent did it come down?
  6. 6.A water tank holds 2640 litres. 50% of the water is used. How many litres are left?
  7. 7.A town has 3120 people. Its population grows by 25%. How many people live there now?
  8. 8.The price of a school bag changes from ₹4460 to ₹2230. By what percent did it come down?
  9. 9.A water tank holds 1180 litres. 25% of the water is used. How many litres are left?
  10. 10.A shop sells 4980 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  11. 11.The price of a bicycle is ₹1540. It goes up by 5%. What is the new price (in ₹)?
  12. 12.The price of a bicycle is ₹4300. It goes up by 10%. What is the new price (in ₹)?
  13. 13.A water tank holds 1600 litres. 30% of the water is used. How many litres are left?
  14. 14.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  15. 15.A town has 2560 people. Its population grows by 30%. How many people live there now?
  16. 16.A shop sells 3660 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  17. 17.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 4660 litres. 10% of the water is used. How many litres are left?
  19. 19.A water tank holds 3220 litres. 10% of the water is used. How many litres are left?
  20. 20.A water tank holds 2680 litres. 20% of the water is used. How many litres are left?
  21. 21.A town has 3600 people. Its population grows by 15%. How many people live there now?
  22. 22.The price of a school bag changes from ₹2620 to ₹2751. By what percent did it go up?
  23. 23.A town has 2280 people. Its population grows by 40%. How many people live there now?
  24. 24.A water tank holds 5000 litres. 15% of the water is used. How many litres are left?
  25. 25.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  26. 26.A water tank holds 1680 litres. 25% of the water is used. How many litres are left?
  27. 27.A town has 1320 people. Its population grows by 5%. How many people live there now?
  28. 28.A water tank holds 2700 litres. 30% of the water is used. How many litres are left?
  29. 29.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  30. 30.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹1720 to ₹1376. By what percent did it come down?
  32. 32.A shop sells 1380 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  33. 33.The price of a bicycle is ₹4680. It goes up by 15%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹1680 to ₹2016. By what percent did it go up?
  35. 35.A shop sells 2560 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  37. 37.A shop sells 4380 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  38. 38.A water tank holds 4300 litres. 10% of the water is used. How many litres are left?
  39. 39.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  40. 40.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =

Answer key

  1. 49.5
  2. 4900
  3. 15
  4. 58
  5. 15
  6. 1320
  7. 3900
  8. 50
  9. 885
  10. 6225
  11. 1617
  12. 4730
  13. 1120
  14. 32.25
  15. 3328
  16. 4026
  17. 62.5
  18. 4194
  19. 2898
  20. 2144
  21. 4140
  22. 5
  23. 3192
  24. 4250
  25. 95
  26. 1260
  27. 1386
  28. 1890
  29. 43
  30. 17
  31. 20
  32. 2070
  33. 5382
  34. 20
  35. 2944
  36. 37.5
  37. 6132
  38. 3870
  39. 23.5
  40. 65

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