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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 989 · 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 town has 920 people. Its population grows by 5%. How many people live there now?
  2. 2.The price of a school bag changes from ₹1300 to ₹1430. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹4680 to ₹4446. By what percent did it come down?
  4. 4.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹4040 to ₹6060. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹800 to ₹840. By what percent did it go up?
  7. 7.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  8. 8.A town has 2840 people. Its population grows by 30%. How many people live there now?
  9. 9.A water tank holds 440 litres. 25% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹1940. It goes up by 50%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹4260 to ₹4047. By what percent did it come down?
  12. 12.A water tank holds 1960 litres. 30% of the water is used. How many litres are left?
  13. 13.A water tank holds 240 litres. 10% of the water is used. How many litres are left?
  14. 14.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  15. 15.A shop sells 60 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  16. 16.The price of a school bag changes from ₹740 to ₹925. By what percent did it go up?
  17. 17.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  18. 18.A water tank holds 2400 litres. 25% of the water is used. How many litres are left?
  19. 19.A shop sells 2480 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  20. 20.A town has 3780 people. Its population grows by 25%. How many people live there now?
  21. 21.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 300 litres. 50% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹120. It goes up by 15%. What is the new price (in ₹)?
  24. 24.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.The price of a bicycle is ₹4300. It goes up by 40%. What is the new price (in ₹)?
  26. 26.A water tank holds 3420 litres. 15% of the water is used. How many litres are left?
  27. 27.A town has 120 people. Its population grows by 5%. How many people live there now?
  28. 28.The price of a school bag changes from ₹4220 to ₹5275. By what percent did it go up?
  29. 29.A shop sells 5000 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  30. 30.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  31. 31.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 3540 litres. 20% of the water is used. How many litres are left?
  33. 33.A shop sells 2520 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  34. 34.A water tank holds 1160 litres. 50% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹4300 to ₹5160. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹3680 to ₹3312. By what percent did it come down?
  37. 37.A shop sells 2420 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  38. 38.The price of a school bag changes from ₹2040 to ₹2856. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹3320 to ₹1660. By what percent did it come down?
  40. 40.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 966
  2. 10
  3. 5
  4. 95
  5. 50
  6. 5
  7. 58
  8. 3692
  9. 330
  10. 2910
  11. 5
  12. 1372
  13. 216
  14. 28
  15. 90
  16. 25
  17. 10.5
  18. 1800
  19. 3224
  20. 4725
  21. 26
  22. 150
  23. 138
  24. 37
  25. 6020
  26. 2907
  27. 126
  28. 25
  29. 6250
  30. 80
  31. 56
  32. 2832
  33. 3780
  34. 580
  35. 20
  36. 10
  37. 2783
  38. 40
  39. 50
  40. 55

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