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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 779 · 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 40% and then goes up by 25% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹2920 to ₹3066. By what percent did it go up?
  3. 3.A shop sells 760 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  4. 4.A shop sells 3160 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  5. 5.A town has 3360 people. Its population grows by 10%. How many people live there now?
  6. 6.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 1040 litres. 20% of the water is used. How many litres are left?
  8. 8.A water tank holds 60 litres. 15% of the water is used. How many litres are left?
  9. 9.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  10. 10.The price of a school bag changes from ₹2080 to ₹2184. By what percent did it go up?
  11. 11.A shop sells 1440 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  12. 12.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 1060 litres. 25% of the water is used. How many litres are left?
  14. 14.A town has 1120 people. Its population grows by 5%. How many people live there now?
  15. 15.A town has 280 people. Its population grows by 15%. How many people live there now?
  16. 16.A shop sells 3280 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  17. 17.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  18. 18.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  19. 19.A shop sells 3660 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  20. 20.A shop sells 1880 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  21. 21.A shop sells 440 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  22. 22.A water tank holds 320 litres. 5% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹4400 to ₹5500. By what percent did it go up?
  24. 24.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  25. 25.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  26. 26.A town has 2820 people. Its population grows by 30%. How many people live there now?
  27. 27.The price of a bicycle is ₹260. It goes up by 30%. What is the new price (in ₹)?
  28. 28.A water tank holds 2980 litres. 25% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹2640 to ₹1980. By what percent did it come down?
  30. 30.A water tank holds 2820 litres. 5% of the water is used. How many litres are left?
  31. 31.A town has 740 people. Its population grows by 25%. How many people live there now?
  32. 32.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  33. 33.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹4440 to ₹5772. By what percent did it go up?
  35. 35.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  36. 36.The price of a bicycle is ₹1000. It goes up by 10%. What is the new price (in ₹)?
  37. 37.The price of a bicycle is ₹800. It goes up by 5%. What is the new price (in ₹)?
  38. 38.The price of a bicycle is ₹500. It goes up by 40%. What is the new price (in ₹)?
  39. 39.A town has 2240 people. Its population grows by 10%. How many people live there now?
  40. 40.The price of a bicycle is ₹4340. It goes up by 25%. What is the new price (in ₹)?

Answer key

  1. 75
  2. 5
  3. 950
  4. 4108
  5. 3696
  6. 57.5
  7. 832
  8. 51
  9. 26
  10. 5
  11. 1584
  12. 54
  13. 795
  14. 1176
  15. 322
  16. 4100
  17. 28
  18. 12
  19. 4758
  20. 2350
  21. 462
  22. 304
  23. 25
  24. 65
  25. 52.5
  26. 3666
  27. 338
  28. 2235
  29. 25
  30. 2679
  31. 925
  32. 32
  33. 14
  34. 30
  35. 19
  36. 1100
  37. 840
  38. 700
  39. 2464
  40. 5425

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