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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 827 · 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.The price of a bicycle is ₹820. It goes up by 30%. What is the new price (in ₹)?
  2. 2.The price of a school bag changes from ₹2620 to ₹2358. By what percent did it come down?
  3. 3.A town has 3660 people. Its population grows by 10%. How many people live there now?
  4. 4.A town has 820 people. Its population grows by 10%. How many people live there now?
  5. 5.A water tank holds 4520 litres. 10% of the water is used. How many litres are left?
  6. 6.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 4680 litres. 10% of the water is used. How many litres are left?
  8. 8.A town has 740 people. Its population grows by 5%. How many people live there now?
  9. 9.The price of a school bag changes from ₹2460 to ₹1968. By what percent did it come down?
  10. 10.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  11. 11.A water tank holds 4480 litres. 40% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹840. It goes up by 5%. What is the new price (in ₹)?
  13. 13.The price of a bicycle is ₹3400. It goes up by 10%. What is the new price (in ₹)?
  14. 14.The price of a school bag changes from ₹4260 to ₹5964. By what percent did it go up?
  15. 15.A shop sells 660 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  16. 16.The price of a bicycle is ₹3300. It goes up by 40%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹3000. It goes up by 50%. What is the new price (in ₹)?
  18. 18.A shop sells 2420 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  19. 19.A water tank holds 620 litres. 20% of the water is used. How many litres are left?
  20. 20.A water tank holds 1260 litres. 10% of the water is used. How many litres are left?
  21. 21.A water tank holds 980 litres. 5% of the water is used. How many litres are left?
  22. 22.A shop sells 3120 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹2360 to ₹2950. By what percent did it go up?
  24. 24.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹4020 to ₹5628. By what percent did it go up?
  26. 26.A shop sells 4620 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  27. 27.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  28. 28.A town has 3800 people. Its population grows by 30%. How many people live there now?
  29. 29.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  30. 30.The price of a school bag changes from ₹1960 to ₹2254. By what percent did it go up?
  31. 31.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  32. 32.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  33. 33.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  34. 34.A water tank holds 1000 litres. 10% of the water is used. How many litres are left?
  35. 35.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.A water tank holds 3560 litres. 40% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹3260. It goes up by 5%. What is the new price (in ₹)?
  38. 38.A town has 1760 people. Its population grows by 40%. How many people live there now?
  39. 39.The price of a school bag changes from ₹1520 to ₹1824. By what percent did it go up?
  40. 40.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =

Answer key

  1. 1066
  2. 10
  3. 4026
  4. 902
  5. 4068
  6. 110
  7. 4212
  8. 777
  9. 20
  10. 40
  11. 2688
  12. 882
  13. 3740
  14. 40
  15. 792
  16. 4620
  17. 4500
  18. 3630
  19. 496
  20. 1134
  21. 931
  22. 3432
  23. 25
  24. 14.5
  25. 40
  26. 6006
  27. 23.5
  28. 4940
  29. 43
  30. 15
  31. 21
  32. 37.5
  33. 43
  34. 900
  35. 70
  36. 2136
  37. 3423
  38. 2464
  39. 20
  40. 33

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