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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 489 · 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 20% and then comes down by 5% more. By what percent has it come down in all? =
  2. 2.The price of a school bag changes from ₹3280 to ₹4920. By what percent did it go up?
  3. 3.A town has 1640 people. Its population grows by 40%. How many people live there now?
  4. 4.A water tank holds 1140 litres. 50% of the water is used. How many litres are left?
  5. 5.A town has 2120 people. Its population grows by 50%. How many people live there now?
  6. 6.The price of a school bag changes from ₹5000 to ₹3500. By what percent did it come down?
  7. 7.The price of a bicycle is ₹3080. It goes up by 10%. What is the new price (in ₹)?
  8. 8.A water tank holds 4980 litres. 10% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹1560 to ₹1248. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹2880 to ₹2304. By what percent did it come down?
  11. 11.The price of a bicycle is ₹2540. It goes up by 30%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹1560 to ₹1950. By what percent did it go up?
  13. 13.A shop sells 1680 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  14. 14.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹1980 to ₹2970. By what percent did it go up?
  16. 16.The price of a bicycle is ₹2160. It goes up by 25%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹4520 to ₹6328. By what percent did it go up?
  18. 18.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  19. 19.The price of a school bag changes from ₹120 to ₹114. By what percent did it come down?
  20. 20.A water tank holds 4880 litres. 30% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹1100. It goes up by 10%. What is the new price (in ₹)?
  22. 22.The price of a bicycle is ₹4440. It goes up by 5%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹1080 to ₹1404. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹2700 to ₹2835. By what percent did it go up?
  25. 25.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.A shop sells 1320 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹4700 to ₹7050. By what percent did it go up?
  28. 28.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  29. 29.A town has 1680 people. Its population grows by 50%. How many people live there now?
  30. 30.A water tank holds 2800 litres. 10% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹3220. It goes up by 20%. What is the new price (in ₹)?
  32. 32.A water tank holds 1520 litres. 15% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1020 to ₹816. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹2620 to ₹3668. By what percent did it go up?
  35. 35.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  36. 36.A water tank holds 1040 litres. 5% of the water is used. How many litres are left?
  37. 37.A water tank holds 1840 litres. 25% of the water is used. How many litres are left?
  38. 38.A water tank holds 3520 litres. 10% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹800 to ₹600. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹1120 to ₹1008. By what percent did it come down?

Answer key

  1. 24
  2. 50
  3. 2296
  4. 570
  5. 3180
  6. 30
  7. 3388
  8. 4482
  9. 20
  10. 20
  11. 3302
  12. 25
  13. 2184
  14. 43
  15. 50
  16. 2700
  17. 40
  18. 58
  19. 5
  20. 3416
  21. 1210
  22. 4662
  23. 30
  24. 5
  25. 82
  26. 1716
  27. 50
  28. 40
  29. 2520
  30. 2520
  31. 3864
  32. 1292
  33. 20
  34. 40
  35. 32
  36. 988
  37. 1380
  38. 3168
  39. 25
  40. 10

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