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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 329 · 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 4800 people. Its population grows by 10%. How many people live there now?
  2. 2.The price of a school bag changes from ₹1780 to ₹2225. By what percent did it go up?
  3. 3.The price of a bicycle is ₹3240. It goes up by 5%. What is the new price (in ₹)?
  4. 4.A water tank holds 640 litres. 25% of the water is used. How many litres are left?
  5. 5.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  6. 6.A shop sells 2060 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  7. 7.The price of a bicycle is ₹1040. It goes up by 15%. What is the new price (in ₹)?
  8. 8.A town has 1280 people. Its population grows by 25%. How many people live there now?
  9. 9.A water tank holds 1040 litres. 10% of the water is used. How many litres are left?
  10. 10.A water tank holds 2820 litres. 50% of the water is used. How many litres are left?
  11. 11.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹2000 to ₹2400. By what percent did it go up?
  13. 13.A water tank holds 1100 litres. 20% of the water is used. How many litres are left?
  14. 14.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹1560 to ₹2340. By what percent did it go up?
  16. 16.A shop sells 1640 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  17. 17.A water tank holds 4500 litres. 25% of the water is used. How many litres are left?
  18. 18.A shop sells 2040 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  19. 19.A town has 4300 people. Its population grows by 10%. How many people live there now?
  20. 20.A water tank holds 3600 litres. 50% of the water is used. How many litres are left?
  21. 21.A water tank holds 3140 litres. 25% of the water is used. How many litres are left?
  22. 22.The price of a bicycle is ₹1200. It goes up by 20%. What is the new price (in ₹)?
  23. 23.A water tank holds 1700 litres. 5% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹200 to ₹150. By what percent did it come down?
  25. 25.A town has 240 people. Its population grows by 25%. How many people live there now?
  26. 26.A shop sells 880 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹1540 to ₹1078. By what percent did it come down?
  28. 28.The price of a bicycle is ₹240. It goes up by 20%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹540 to ₹513. By what percent did it come down?
  30. 30.A water tank holds 1080 litres. 20% of the water is used. How many litres are left?
  31. 31.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹4820 to ₹2410. By what percent did it come down?
  33. 33.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹3460 to ₹1730. By what percent did it come down?
  35. 35.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  36. 36.A water tank holds 620 litres. 40% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹3360 to ₹3528. By what percent did it go up?
  38. 38.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  39. 39.A shop sells 920 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  40. 40.The price of a bicycle is ₹4860. It goes up by 50%. What is the new price (in ₹)?

Answer key

  1. 5280
  2. 25
  3. 3402
  4. 480
  5. 33
  6. 2678
  7. 1196
  8. 1600
  9. 936
  10. 1410
  11. 23.5
  12. 20
  13. 880
  14. 57.5
  15. 50
  16. 2296
  17. 3375
  18. 3060
  19. 4730
  20. 1800
  21. 2355
  22. 1440
  23. 1615
  24. 25
  25. 300
  26. 924
  27. 30
  28. 288
  29. 5
  30. 864
  31. 19
  32. 50
  33. 32.25
  34. 50
  35. 5
  36. 372
  37. 5
  38. 43
  39. 1196
  40. 7290

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