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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 933 · 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 2860 litres. 25% of the water is used. How many litres are left?
  2. 2.A town has 1920 people. Its population grows by 20%. How many people live there now?
  3. 3.The price of a school bag changes from ₹2340 to ₹1638. By what percent did it come down?
  4. 4.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  5. 5.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  6. 6.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  7. 7.The price of a bicycle is ₹4260. It goes up by 5%. What is the new price (in ₹)?
  8. 8.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  9. 9.A shop sells 2400 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  10. 10.A shop sells 960 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  11. 11.The price of a bicycle is ₹1740. It goes up by 15%. What is the new price (in ₹)?
  12. 12.A water tank holds 2720 litres. 30% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹3460 to ₹5190. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹4820 to ₹5061. By what percent did it go up?
  15. 15.A water tank holds 4340 litres. 20% of the water is used. How many litres are left?
  16. 16.A town has 1560 people. Its population grows by 20%. How many people live there now?
  17. 17.A shop sells 3380 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹1980 to ₹1881. By what percent did it come down?
  19. 19.A water tank holds 720 litres. 15% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹560 to ₹840. By what percent did it go up?
  21. 21.A water tank holds 700 litres. 15% of the water is used. How many litres are left?
  22. 22.A water tank holds 4940 litres. 10% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹1860 to ₹2325. By what percent did it go up?
  24. 24.A shop sells 1660 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  25. 25.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  26. 26.A shop sells 3340 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  27. 27.A town has 1680 people. Its population grows by 10%. How many people live there now?
  28. 28.The price of a school bag changes from ₹2820 to ₹4230. By what percent did it go up?
  29. 29.A shop sells 3920 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  30. 30.A shop sells 2940 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  31. 31.The price of a school bag changes from ₹2380 to ₹2142. By what percent did it come down?
  32. 32.A town has 2100 people. Its population grows by 20%. How many people live there now?
  33. 33.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  34. 34.A shop sells 280 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  35. 35.The price of a school bag changes from ₹720 to ₹1080. By what percent did it go up?
  36. 36.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  37. 37.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  38. 38.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.A town has 380 people. Its population grows by 10%. How many people live there now?
  40. 40.A shop sells 80 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?

Answer key

  1. 2145
  2. 2304
  3. 30
  4. 43
  5. 58
  6. 65
  7. 4473
  8. 26.5
  9. 3000
  10. 1056
  11. 2001
  12. 1904
  13. 50
  14. 5
  15. 3472
  16. 1872
  17. 4225
  18. 5
  19. 612
  20. 50
  21. 595
  22. 4446
  23. 25
  24. 1743
  25. 46
  26. 4008
  27. 1848
  28. 50
  29. 4312
  30. 3675
  31. 10
  32. 2520
  33. 20.75
  34. 322
  35. 50
  36. 4
  37. 50
  38. 72.5
  39. 418
  40. 120

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