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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 450 · 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 ₹900 to ₹1260. By what percent did it go up?
  2. 2.The price of a school bag changes from ₹280 to ₹224. By what percent did it come down?
  3. 3.A water tank holds 3340 litres. 10% of the water is used. How many litres are left?
  4. 4.A water tank holds 2000 litres. 20% of the water is used. How many litres are left?
  5. 5.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹3600 to ₹4320. By what percent did it go up?
  7. 7.A town has 740 people. Its population grows by 40%. How many people live there now?
  8. 8.A shop sells 3920 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  9. 9.A water tank holds 1100 litres. 40% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹2340. It goes up by 15%. What is the new price (in ₹)?
  11. 11.A water tank holds 3240 litres. 25% of the water is used. How many litres are left?
  12. 12.A shop sells 2200 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  13. 13.The price of a bicycle is ₹940. It goes up by 50%. What is the new price (in ₹)?
  14. 14.A water tank holds 2760 litres. 40% of the water is used. How many litres are left?
  15. 15.A water tank holds 4780 litres. 5% of the water is used. How many litres are left?
  16. 16.A water tank holds 580 litres. 40% of the water is used. How many litres are left?
  17. 17.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  18. 18.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  19. 19.A water tank holds 2600 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹560 to ₹448. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹600 to ₹660. By what percent did it go up?
  22. 22.A town has 1160 people. Its population grows by 10%. How many people live there now?
  23. 23.A town has 3140 people. Its population grows by 20%. How many people live there now?
  24. 24.A shop sells 2920 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  25. 25.A town has 600 people. Its population grows by 15%. How many people live there now?
  26. 26.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  27. 27.A water tank holds 1220 litres. 25% of the water is used. How many litres are left?
  28. 28.A town has 1960 people. Its population grows by 30%. How many people live there now?
  29. 29.The price of a bicycle is ₹3020. It goes up by 30%. What is the new price (in ₹)?
  30. 30.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  31. 31.A water tank holds 2460 litres. 30% of the water is used. How many litres are left?
  32. 32.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  33. 33.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  34. 34.A water tank holds 1240 litres. 50% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹2820. It goes up by 40%. What is the new price (in ₹)?
  36. 36.The price of a bicycle is ₹4820. It goes up by 30%. What is the new price (in ₹)?
  37. 37.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹3880 to ₹2716. By what percent did it come down?
  39. 39.A water tank holds 2920 litres. 25% of the water is used. How many litres are left?
  40. 40.A water tank holds 2680 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 40
  2. 20
  3. 3006
  4. 1600
  5. 52.5
  6. 20
  7. 1036
  8. 5880
  9. 660
  10. 2691
  11. 2430
  12. 2530
  13. 1410
  14. 1656
  15. 4541
  16. 348
  17. 125
  18. 36.5
  19. 1820
  20. 20
  21. 10
  22. 1276
  23. 3768
  24. 3650
  25. 690
  26. 9.75
  27. 915
  28. 2548
  29. 3926
  30. 4
  31. 1722
  32. 37
  33. 47.5
  34. 620
  35. 3948
  36. 6266
  37. 26.5
  38. 30
  39. 2190
  40. 2010

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