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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 990 · 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 20% and then comes down by 10%. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹1340 to ₹1608. By what percent did it go up?
  3. 3.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  4. 4.A shop sells 3880 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  5. 5.A water tank holds 2480 litres. 15% of the water is used. How many litres are left?
  6. 6.The price of a bicycle is ₹2160. It goes up by 50%. What is the new price (in ₹)?
  7. 7.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  9. 9.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  10. 10.A shop sells 2500 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  11. 11.A shop sells 720 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  12. 12.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  14. 14.A town has 940 people. Its population grows by 20%. How many people live there now?
  15. 15.A water tank holds 1540 litres. 10% of the water is used. How many litres are left?
  16. 16.A town has 1560 people. Its population grows by 10%. How many people live there now?
  17. 17.The price of a bicycle is ₹4860. It goes up by 25%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹1220 to ₹915. By what percent did it come down?
  19. 19.A water tank holds 3320 litres. 40% of the water is used. How many litres are left?
  20. 20.A shop sells 3040 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  21. 21.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  22. 22.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 4600 litres. 10% of the water is used. How many litres are left?
  24. 24.A water tank holds 1340 litres. 5% of the water is used. How many litres are left?
  25. 25.A water tank holds 400 litres. 15% of the water is used. How many litres are left?
  26. 26.A town has 4280 people. Its population grows by 50%. How many people live there now?
  27. 27.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹4640 to ₹5104. By what percent did it go up?
  29. 29.A town has 4960 people. Its population grows by 50%. How many people live there now?
  30. 30.The price of a school bag changes from ₹4320 to ₹4536. By what percent did it go up?
  31. 31.The price of a school bag changes from ₹3780 to ₹3591. By what percent did it come down?
  32. 32.A water tank holds 1220 litres. 50% of the water is used. How many litres are left?
  33. 33.A shop sells 1740 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  34. 34.A town has 2820 people. Its population grows by 10%. How many people live there now?
  35. 35.The price of a school bag changes from ₹3100 to ₹1860. By what percent did it come down?
  36. 36.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  37. 37.A shop sells 1560 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  38. 38.A water tank holds 620 litres. 15% of the water is used. How many litres are left?
  39. 39.A town has 1080 people. Its population grows by 20%. How many people live there now?
  40. 40.A water tank holds 1340 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 8
  2. 20
  3. 57.5
  4. 4462
  5. 2108
  6. 3240
  7. 15.5
  8. 15.5
  9. 33.5
  10. 2875
  11. 900
  12. 82
  13. 32
  14. 1128
  15. 1386
  16. 1716
  17. 6075
  18. 25
  19. 1992
  20. 4560
  21. 51
  22. 10.25
  23. 4140
  24. 1273
  25. 340
  26. 6420
  27. 43
  28. 10
  29. 7440
  30. 5
  31. 5
  32. 610
  33. 2262
  34. 3102
  35. 40
  36. 26.5
  37. 1872
  38. 527
  39. 1296
  40. 938

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