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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 674 · 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 3240 people. Its population grows by 30%. How many people live there now?
  2. 2.A water tank holds 3180 litres. 40% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹1160 to ₹1102. By what percent did it come down?
  4. 4.A shop sells 3320 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  5. 5.The price of a bicycle is ₹2840. It goes up by 10%. What is the new price (in ₹)?
  6. 6.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  7. 7.A water tank holds 1640 litres. 50% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹3800 to ₹4180. By what percent did it go up?
  9. 9.A shop sells 1320 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  10. 10.A water tank holds 4520 litres. 50% of the water is used. How many litres are left?
  11. 11.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  12. 12.The price of a bicycle is ₹1180. It goes up by 5%. What is the new price (in ₹)?
  13. 13.A water tank holds 2980 litres. 40% of the water is used. How many litres are left?
  14. 14.A shop sells 1480 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  15. 15.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  16. 16.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  17. 17.A water tank holds 1920 litres. 20% of the water is used. How many litres are left?
  18. 18.A shop sells 3040 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  19. 19.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  20. 20.A water tank holds 960 litres. 50% of the water is used. How many litres are left?
  21. 21.A town has 4760 people. Its population grows by 5%. How many people live there now?
  22. 22.A water tank holds 3460 litres. 5% of the water is used. How many litres are left?
  23. 23.A shop sells 1520 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  24. 24.A shop sells 2940 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  25. 25.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  26. 26.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹2440 to ₹2318. By what percent did it come down?
  28. 28.A town has 80 people. Its population grows by 50%. How many people live there now?
  29. 29.A water tank holds 4020 litres. 10% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹4520. It goes up by 5%. What is the new price (in ₹)?
  31. 31.The price of a bicycle is ₹1900. It goes up by 5%. What is the new price (in ₹)?
  32. 32.A water tank holds 420 litres. 15% of the water is used. How many litres are left?
  33. 33.A water tank holds 1180 litres. 5% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹4500. It goes up by 20%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹3360 to ₹2520. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹720 to ₹648. By what percent did it come down?
  37. 37.The price of a bicycle is ₹4860. It goes up by 30%. What is the new price (in ₹)?
  38. 38.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 1620 litres. 10% of the water is used. How many litres are left?
  40. 40.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =

Answer key

  1. 4212
  2. 1908
  3. 5
  4. 4648
  5. 3124
  6. 36.25
  7. 820
  8. 10
  9. 1452
  10. 2260
  11. 23.5
  12. 1239
  13. 1788
  14. 2220
  15. 47
  16. 75
  17. 1536
  18. 3344
  19. 28.75
  20. 480
  21. 4998
  22. 3287
  23. 1976
  24. 3234
  25. 43
  26. 37
  27. 5
  28. 120
  29. 3618
  30. 4746
  31. 1995
  32. 357
  33. 1121
  34. 5400
  35. 25
  36. 10
  37. 6318
  38. 26
  39. 1458
  40. 26

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