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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 447 · 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 goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹960 to ₹1104. By what percent did it go up?
  3. 3.A water tank holds 3720 litres. 50% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹1520 to ₹1368. By what percent did it come down?
  5. 5.A water tank holds 2520 litres. 25% of the water is used. How many litres are left?
  6. 6.A shop sells 700 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  7. 7.The price of a school bag changes from ₹1360 to ₹1700. By what percent did it go up?
  8. 8.A town has 2800 people. Its population grows by 10%. How many people live there now?
  9. 9.A water tank holds 1320 litres. 20% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹3460. It goes up by 15%. What is the new price (in ₹)?
  11. 11.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  12. 12.The price of a bicycle is ₹3820. It goes up by 20%. What is the new price (in ₹)?
  13. 13.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹2860 to ₹2002. By what percent did it come down?
  15. 15.A water tank holds 100 litres. 15% of the water is used. How many litres are left?
  16. 16.A shop sells 1560 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹1860 to ₹2046. By what percent did it go up?
  18. 18.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹2660. It goes up by 10%. What is the new price (in ₹)?
  20. 20.A water tank holds 1680 litres. 50% of the water is used. How many litres are left?
  21. 21.A water tank holds 3780 litres. 50% of the water is used. How many litres are left?
  22. 22.A water tank holds 1580 litres. 5% of the water is used. How many litres are left?
  23. 23.A water tank holds 380 litres. 5% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹3940 to ₹4925. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹1040 to ₹1560. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹1480 to ₹740. By what percent did it come down?
  27. 27.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  29. 29.A shop sells 1300 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  30. 30.A town has 1280 people. Its population grows by 50%. How many people live there now?
  31. 31.The price of a school bag changes from ₹4780 to ₹5736. By what percent did it go up?
  32. 32.A town has 1520 people. Its population grows by 10%. How many people live there now?
  33. 33.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  34. 34.A town has 2060 people. Its population grows by 20%. How many people live there now?
  35. 35.A town has 4740 people. Its population grows by 15%. How many people live there now?
  36. 36.The price of a school bag changes from ₹340 to ₹374. By what percent did it go up?
  37. 37.The price of a bicycle is ₹4600. It goes up by 40%. What is the new price (in ₹)?
  38. 38.A water tank holds 3800 litres. 30% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹960 to ₹576. By what percent did it come down?
  40. 40.A shop sells 3000 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?

Answer key

  1. 20.75
  2. 15
  3. 1860
  4. 10
  5. 1890
  6. 980
  7. 25
  8. 3080
  9. 1056
  10. 3979
  11. 28.75
  12. 4584
  13. 64
  14. 30
  15. 85
  16. 2340
  17. 10
  18. 23.5
  19. 2926
  20. 840
  21. 1890
  22. 1501
  23. 361
  24. 25
  25. 50
  26. 50
  27. 61
  28. 37.5
  29. 1365
  30. 1920
  31. 20
  32. 1672
  33. 57.5
  34. 2472
  35. 5451
  36. 10
  37. 6440
  38. 2660
  39. 40
  40. 3300

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