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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 158 · 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 30% and then comes down by 25% more. By what percent has it come down in all? =
  2. 2.A water tank holds 500 litres. 15% of the water is used. How many litres are left?
  3. 3.A water tank holds 2820 litres. 50% of the water is used. How many litres are left?
  4. 4.A water tank holds 3920 litres. 50% of the water is used. How many litres are left?
  5. 5.A water tank holds 1860 litres. 15% of the water is used. How many litres are left?
  6. 6.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 1200 litres. 30% of the water is used. How many litres are left?
  8. 8.A town has 3720 people. Its population grows by 10%. How many people live there now?
  9. 9.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 2940 litres. 15% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹4980 to ₹5727. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹580 to ₹667. By what percent did it go up?
  13. 13.A water tank holds 60 litres. 40% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹2520 to ₹1512. By what percent did it come down?
  15. 15.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  16. 16.A water tank holds 400 litres. 50% of the water is used. How many litres are left?
  17. 17.A shop sells 2860 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹2480 to ₹2852. By what percent did it go up?
  19. 19.A town has 800 people. Its population grows by 15%. How many people live there now?
  20. 20.A town has 2000 people. Its population grows by 15%. How many people live there now?
  21. 21.The price of a school bag changes from ₹1560 to ₹1482. By what percent did it come down?
  22. 22.A town has 540 people. Its population grows by 20%. How many people live there now?
  23. 23.A water tank holds 1180 litres. 10% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹4860 to ₹2430. By what percent did it come down?
  25. 25.A shop sells 3480 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  26. 26.A shop sells 2860 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  27. 27.The price of a bicycle is ₹2640. It goes up by 5%. What is the new price (in ₹)?
  28. 28.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 1220 litres. 25% of the water is used. How many litres are left?
  30. 30.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  31. 31.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.A town has 2560 people. Its population grows by 10%. How many people live there now?
  33. 33.A shop sells 4140 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  34. 34.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  35. 35.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 4300 litres. 40% of the water is used. How many litres are left?
  37. 37.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  38. 38.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹2320 to ₹3248. By what percent did it go up?
  40. 40.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =

Answer key

  1. 47.5
  2. 425
  3. 1410
  4. 1960
  5. 1581
  6. 26.5
  7. 840
  8. 4092
  9. 26
  10. 2499
  11. 15
  12. 15
  13. 36
  14. 40
  15. 19
  16. 200
  17. 3146
  18. 15
  19. 920
  20. 2300
  21. 5
  22. 648
  23. 1062
  24. 50
  25. 3828
  26. 4004
  27. 2772
  28. 38
  29. 915
  30. 55
  31. 33.5
  32. 2816
  33. 4347
  34. 58
  35. 65
  36. 2580
  37. 43
  38. 10.5
  39. 40
  40. 70

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