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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 523 · 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 3800 people. Its population grows by 10%. How many people live there now?
  2. 2.The price of a school bag changes from ₹4820 to ₹5061. By what percent did it go up?
  3. 3.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  4. 4.The price of a bicycle is ₹1160. It goes up by 20%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹620. It goes up by 5%. What is the new price (in ₹)?
  6. 6.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  7. 7.A town has 440 people. Its population grows by 50%. How many people live there now?
  8. 8.The price of a bicycle is ₹2560. It goes up by 30%. What is the new price (in ₹)?
  9. 9.The price of a school bag changes from ₹1900 to ₹1805. By what percent did it come down?
  10. 10.A town has 3940 people. Its population grows by 15%. How many people live there now?
  11. 11.A town has 500 people. Its population grows by 10%. How many people live there now?
  12. 12.The price of a school bag changes from ₹260 to ₹182. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹3900 to ₹2925. By what percent did it come down?
  14. 14.A water tank holds 2520 litres. 5% of the water is used. How many litres are left?
  15. 15.A water tank holds 1100 litres. 10% of the water is used. How many litres are left?
  16. 16.A town has 4780 people. Its population grows by 40%. How many people live there now?
  17. 17.The price of a school bag changes from ₹3640 to ₹4368. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹4380 to ₹5694. By what percent did it go up?
  19. 19.The price of a bicycle is ₹3980. It goes up by 20%. What is the new price (in ₹)?
  20. 20.A shop sells 5000 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  21. 21.A town has 780 people. Its population grows by 15%. How many people live there now?
  22. 22.The price of a school bag changes from ₹1240 to ₹1302. By what percent did it go up?
  23. 23.A shop sells 3260 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹4660 to ₹4893. By what percent did it go up?
  25. 25.A town has 3420 people. Its population grows by 25%. How many people live there now?
  26. 26.A water tank holds 3240 litres. 30% of the water is used. How many litres are left?
  27. 27.A water tank holds 4460 litres. 25% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹2920 to ₹3796. By what percent did it go up?
  29. 29.A town has 3260 people. Its population grows by 25%. How many people live there now?
  30. 30.A water tank holds 3900 litres. 25% of the water is used. How many litres are left?
  31. 31.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  32. 32.The price of a bicycle is ₹720. It goes up by 10%. What is the new price (in ₹)?
  33. 33.A water tank holds 3360 litres. 10% of the water is used. How many litres are left?
  34. 34.A water tank holds 4940 litres. 20% of the water is used. How many litres are left?
  35. 35.A water tank holds 2300 litres. 15% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹540 to ₹648. By what percent did it go up?
  37. 37.A shop sells 860 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  38. 38.A water tank holds 3340 litres. 40% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹4300 to ₹3225. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹3640 to ₹2730. By what percent did it come down?

Answer key

  1. 4180
  2. 5
  3. 43.75
  4. 1392
  5. 651
  6. 55
  7. 660
  8. 3328
  9. 5
  10. 4531
  11. 550
  12. 30
  13. 25
  14. 2394
  15. 990
  16. 6692
  17. 20
  18. 30
  19. 4776
  20. 7500
  21. 897
  22. 5
  23. 4238
  24. 5
  25. 4275
  26. 2268
  27. 3345
  28. 30
  29. 4075
  30. 2925
  31. 75
  32. 792
  33. 3024
  34. 3952
  35. 1955
  36. 20
  37. 903
  38. 2004
  39. 25
  40. 25

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