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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 188 · 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 school bag changes from ₹1520 to ₹912. By what percent did it come down?
  2. 2.The price of a bicycle is ₹720. It goes up by 40%. What is the new price (in ₹)?
  3. 3.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  4. 4.A town has 1320 people. Its population grows by 5%. How many people live there now?
  5. 5.A water tank holds 1540 litres. 5% of the water is used. How many litres are left?
  6. 6.A water tank holds 2800 litres. 5% of the water is used. How many litres are left?
  7. 7.A town has 4780 people. Its population grows by 50%. How many people live there now?
  8. 8.The price of a bicycle is ₹1140. It goes up by 10%. What is the new price (in ₹)?
  9. 9.The price of a bicycle is ₹440. It goes up by 25%. What is the new price (in ₹)?
  10. 10.A water tank holds 3520 litres. 5% of the water is used. How many litres are left?
  11. 11.A shop sells 3460 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  12. 12.A water tank holds 3100 litres. 30% of the water is used. How many litres are left?
  13. 13.A water tank holds 4720 litres. 25% of the water is used. How many litres are left?
  14. 14.The price of a bicycle is ₹840. It goes up by 10%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹3080. It goes up by 50%. What is the new price (in ₹)?
  16. 16.The price of a bicycle is ₹3080. It goes up by 5%. What is the new price (in ₹)?
  17. 17.A water tank holds 500 litres. 40% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹1800 to ₹2340. By what percent did it go up?
  19. 19.A water tank holds 2880 litres. 5% of the water is used. How many litres are left?
  20. 20.The price of a bicycle is ₹4240. It goes up by 25%. What is the new price (in ₹)?
  21. 21.A shop sells 3040 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  22. 22.A shop sells 2380 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  23. 23.The price of a school bag changes from ₹4740 to ₹5451. By what percent did it go up?
  24. 24.A water tank holds 1360 litres. 50% of the water is used. How many litres are left?
  25. 25.A water tank holds 3820 litres. 50% of the water is used. How many litres are left?
  26. 26.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  27. 27.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹4480 to ₹5152. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹4740 to ₹5214. By what percent did it go up?
  30. 30.A shop sells 680 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  31. 31.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 4420 litres. 15% of the water is used. How many litres are left?
  33. 33.A water tank holds 1460 litres. 50% of the water is used. How many litres are left?
  34. 34.A town has 2360 people. Its population grows by 50%. How many people live there now?
  35. 35.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  36. 36.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹3100 to ₹3720. By what percent did it go up?
  38. 38.The price of a school bag changes from ₹2760 to ₹1932. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹1420 to ₹1562. By what percent did it go up?
  40. 40.A town has 1900 people. Its population grows by 50%. How many people live there now?

Answer key

  1. 40
  2. 1008
  3. 37.5
  4. 1386
  5. 1463
  6. 2660
  7. 7170
  8. 1254
  9. 550
  10. 3344
  11. 3979
  12. 2170
  13. 3540
  14. 924
  15. 4620
  16. 3234
  17. 300
  18. 30
  19. 2736
  20. 5300
  21. 3800
  22. 2499
  23. 15
  24. 680
  25. 1910
  26. 55
  27. 43.75
  28. 15
  29. 10
  30. 952
  31. 49.5
  32. 3757
  33. 730
  34. 3540
  35. 55
  36. 43
  37. 20
  38. 30
  39. 10
  40. 2850

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