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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 5 · 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 comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  2. 2.A town has 4020 people. Its population grows by 20%. How many people live there now?
  3. 3.A water tank holds 2920 litres. 30% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹60 to ₹51. By what percent did it come down?
  5. 5.A shop sells 740 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  6. 6.A water tank holds 920 litres. 25% of the water is used. How many litres are left?
  7. 7.A town has 3100 people. Its population grows by 20%. How many people live there now?
  8. 8.The price of a school bag changes from ₹280 to ₹350. By what percent did it go up?
  9. 9.The price of a bicycle is ₹2620. It goes up by 30%. What is the new price (in ₹)?
  10. 10.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 300 litres. 40% of the water is used. How many litres are left?
  12. 12.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 3300 litres. 15% of the water is used. How many litres are left?
  14. 14.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  15. 15.A town has 360 people. Its population grows by 25%. How many people live there now?
  16. 16.A water tank holds 400 litres. 15% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹2220. It goes up by 40%. What is the new price (in ₹)?
  18. 18.The price of a bicycle is ₹1540. It goes up by 15%. What is the new price (in ₹)?
  19. 19.A water tank holds 1420 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹2900 to ₹2320. By what percent did it come down?
  21. 21.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  22. 22.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  23. 23.A town has 2660 people. Its population grows by 10%. How many people live there now?
  24. 24.A water tank holds 2720 litres. 40% of the water is used. How many litres are left?
  25. 25.A water tank holds 4340 litres. 40% of the water is used. How many litres are left?
  26. 26.A shop sells 1300 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  27. 27.A water tank holds 740 litres. 15% of the water is used. How many litres are left?
  28. 28.A town has 4700 people. Its population grows by 15%. How many people live there now?
  29. 29.The price of a school bag changes from ₹3500 to ₹4200. By what percent did it go up?
  30. 30.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  31. 31.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹4560 to ₹5928. By what percent did it go up?
  33. 33.A water tank holds 3740 litres. 5% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹900 to ₹855. By what percent did it come down?
  35. 35.A water tank holds 3620 litres. 50% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹1540. It goes up by 50%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹660 to ₹330. By what percent did it come down?
  38. 38.A town has 440 people. Its population grows by 20%. How many people live there now?
  39. 39.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.A shop sells 1360 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?

Answer key

  1. 32.5
  2. 4824
  3. 2044
  4. 15
  5. 962
  6. 690
  7. 3720
  8. 25
  9. 3406
  10. 82
  11. 180
  12. 26
  13. 2805
  14. 32.5
  15. 450
  16. 340
  17. 3108
  18. 1771
  19. 994
  20. 20
  21. 20
  22. 36.25
  23. 2926
  24. 1632
  25. 2604
  26. 1690
  27. 629
  28. 5405
  29. 20
  30. 40
  31. 64
  32. 30
  33. 3553
  34. 5
  35. 1810
  36. 2310
  37. 50
  38. 528
  39. 82
  40. 2040

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