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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 861 · 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 water tank holds 1980 litres. 15% of the water is used. How many litres are left?
  2. 2.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  3. 3.A shop sells 3460 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  4. 4.A shop sells 1800 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  5. 5.A water tank holds 260 litres. 20% of the water is used. How many litres are left?
  6. 6.A town has 4260 people. Its population grows by 50%. How many people live there now?
  7. 7.A water tank holds 2880 litres. 20% of the water is used. How many litres are left?
  8. 8.A water tank holds 2320 litres. 10% of the water is used. How many litres are left?
  9. 9.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  10. 10.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  11. 11.A water tank holds 860 litres. 10% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹3920 to ₹3136. By what percent did it come down?
  13. 13.A town has 880 people. Its population grows by 30%. How many people live there now?
  14. 14.A water tank holds 640 litres. 15% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹3900 to ₹1950. By what percent did it come down?
  16. 16.A water tank holds 640 litres. 50% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹2860. It goes up by 15%. What is the new price (in ₹)?
  18. 18.A water tank holds 2100 litres. 50% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹820 to ₹615. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹4280 to ₹5350. By what percent did it go up?
  21. 21.The price of a bicycle is ₹3780. It goes up by 10%. What is the new price (in ₹)?
  22. 22.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  23. 23.A water tank holds 4480 litres. 10% of the water is used. How many litres are left?
  24. 24.A water tank holds 980 litres. 5% of the water is used. How many litres are left?
  25. 25.A water tank holds 4800 litres. 15% of the water is used. How many litres are left?
  26. 26.A shop sells 2160 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹1840 to ₹2300. By what percent did it go up?
  28. 28.The price of a bicycle is ₹560. It goes up by 25%. What is the new price (in ₹)?
  29. 29.A water tank holds 5000 litres. 40% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹2320 to ₹2552. By what percent did it go up?
  31. 31.A shop sells 1900 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  32. 32.A water tank holds 1740 litres. 20% of the water is used. How many litres are left?
  33. 33.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  34. 34.The price of a bicycle is ₹2520. It goes up by 20%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹2140 to ₹1712. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹900 to ₹990. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹840 to ₹798. By what percent did it come down?
  38. 38.A town has 660 people. Its population grows by 20%. How many people live there now?
  39. 39.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  40. 40.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =

Answer key

  1. 1683
  2. 65
  3. 3806
  4. 2340
  5. 208
  6. 6390
  7. 2304
  8. 2088
  9. 10.5
  10. 49
  11. 774
  12. 20
  13. 1144
  14. 544
  15. 50
  16. 320
  17. 3289
  18. 1050
  19. 25
  20. 25
  21. 4158
  22. 17
  23. 4032
  24. 931
  25. 4080
  26. 3024
  27. 25
  28. 700
  29. 3000
  30. 10
  31. 2850
  32. 1392
  33. 40
  34. 3024
  35. 20
  36. 10
  37. 5
  38. 792
  39. 72.5
  40. 26

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