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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 150 · 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 5% and then goes up by 20% more. By what percent has it gone up in all? =
  2. 2.A town has 3700 people. Its population grows by 10%. How many people live there now?
  3. 3.A town has 2080 people. Its population grows by 30%. How many people live there now?
  4. 4.A water tank holds 4140 litres. 10% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹4360. It goes up by 5%. What is the new price (in ₹)?
  6. 6.A town has 3560 people. Its population grows by 25%. How many people live there now?
  7. 7.The price of a school bag changes from ₹2520 to ₹3528. By what percent did it go up?
  8. 8.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  9. 9.A water tank holds 1780 litres. 5% of the water is used. How many litres are left?
  10. 10.A shop sells 2520 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  11. 11.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  12. 12.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  13. 13.A water tank holds 760 litres. 25% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹1240 to ₹1364. By what percent did it go up?
  15. 15.A water tank holds 4560 litres. 30% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹3140 to ₹2198. By what percent did it come down?
  17. 17.A shop sells 1360 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  18. 18.A shop sells 4420 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  19. 19.The price of a bicycle is ₹3340. It goes up by 30%. What is the new price (in ₹)?
  20. 20.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  21. 21.A water tank holds 1000 litres. 15% of the water is used. How many litres are left?
  22. 22.A water tank holds 2920 litres. 5% of the water is used. How many litres are left?
  23. 23.A water tank holds 2520 litres. 5% of the water is used. How many litres are left?
  24. 24.A water tank holds 1700 litres. 50% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹80 to ₹112. By what percent did it go up?
  26. 26.A water tank holds 4660 litres. 15% of the water is used. How many litres are left?
  27. 27.A shop sells 3480 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  28. 28.A town has 1540 people. Its population grows by 30%. How many people live there now?
  29. 29.A shop sells 820 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  30. 30.The price of a bicycle is ₹4640. It goes up by 10%. What is the new price (in ₹)?
  31. 31.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹400 to ₹520. By what percent did it go up?
  33. 33.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.A town has 4860 people. Its population grows by 30%. How many people live there now?
  35. 35.The price of a school bag changes from ₹4620 to ₹5313. By what percent did it go up?
  36. 36.A water tank holds 4600 litres. 40% of the water is used. How many litres are left?
  37. 37.A shop sells 1820 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  38. 38.The price of a school bag changes from ₹1280 to ₹1024. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹980 to ₹1078. By what percent did it go up?
  40. 40.The price of a school bag changes from ₹4300 to ₹5590. By what percent did it go up?

Answer key

  1. 26
  2. 4070
  3. 2704
  4. 3726
  5. 4578
  6. 4450
  7. 40
  8. 46
  9. 1691
  10. 2772
  11. 23.5
  12. 42.5
  13. 570
  14. 10
  15. 3192
  16. 30
  17. 1768
  18. 4862
  19. 4342
  20. 65
  21. 850
  22. 2774
  23. 2394
  24. 850
  25. 40
  26. 3961
  27. 4176
  28. 2002
  29. 1230
  30. 5104
  31. 37
  32. 30
  33. 37.5
  34. 6318
  35. 15
  36. 2760
  37. 2093
  38. 20
  39. 10
  40. 30

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