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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 109 · 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.

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  1. 1.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹3660 to ₹3477. By what percent did it come down?
  3. 3.The price of a school bag changes from ₹820 to ₹1066. By what percent did it go up?
  4. 4.A water tank holds 1360 litres. 20% of the water is used. How many litres are left?
  5. 5.A shop sells 960 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  6. 6.A shop sells 3800 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  7. 7.A town has 4940 people. Its population grows by 5%. How many people live there now?
  8. 8.A shop sells 1500 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  9. 9.A water tank holds 4540 litres. 10% of the water is used. How many litres are left?
  10. 10.A town has 3860 people. Its population grows by 40%. How many people live there now?
  11. 11.The price of a school bag changes from ₹2380 to ₹2499. By what percent did it go up?
  12. 12.A town has 820 people. Its population grows by 10%. How many people live there now?
  13. 13.The price of a bicycle is ₹4100. It goes up by 5%. What is the new price (in ₹)?
  14. 14.The price of a school bag changes from ₹2100 to ₹2520. By what percent did it go up?
  15. 15.A water tank holds 2420 litres. 50% of the water is used. How many litres are left?
  16. 16.A shop sells 1680 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  17. 17.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹2760 to ₹1656. By what percent did it come down?
  19. 19.A town has 2620 people. Its population grows by 50%. How many people live there now?
  20. 20.A shop sells 2500 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  21. 21.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 4100 litres. 20% of the water is used. How many litres are left?
  23. 23.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  24. 24.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹4680 to ₹3276. By what percent did it come down?
  26. 26.A shop sells 2280 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  27. 27.A water tank holds 1420 litres. 10% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹520 to ₹390. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹3680 to ₹4600. By what percent did it go up?
  30. 30.The price of a bicycle is ₹3300. It goes up by 20%. What is the new price (in ₹)?
  31. 31.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  32. 32.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  34. 34.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  35. 35.A town has 1060 people. Its population grows by 10%. How many people live there now?
  36. 36.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  37. 37.The price of a bicycle is ₹2360. It goes up by 25%. What is the new price (in ₹)?
  38. 38.A town has 1760 people. Its population grows by 5%. How many people live there now?
  39. 39.The price of a school bag changes from ₹2180 to ₹2398. By what percent did it go up?
  40. 40.A water tank holds 1920 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 68
  2. 5
  3. 30
  4. 1088
  5. 1440
  6. 4750
  7. 5187
  8. 1725
  9. 4086
  10. 5404
  11. 5
  12. 902
  13. 4305
  14. 20
  15. 1210
  16. 2100
  17. 50
  18. 40
  19. 3930
  20. 3000
  21. 47
  22. 3280
  23. 26
  24. 44
  25. 30
  26. 3192
  27. 1278
  28. 25
  29. 25
  30. 3960
  31. 40.5
  32. 28.75
  33. 33
  34. 43
  35. 1166
  36. 49.5
  37. 2950
  38. 1848
  39. 10
  40. 1824

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