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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 836 · 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 960 people. Its population grows by 15%. How many people live there now?
  2. 2.The price of a bicycle is ₹4640. It goes up by 10%. What is the new price (in ₹)?
  3. 3.A shop sells 3900 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  4. 4.A water tank holds 3740 litres. 50% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹680 to ₹1020. By what percent did it go up?
  6. 6.The price of a bicycle is ₹4800. It goes up by 30%. What is the new price (in ₹)?
  7. 7.A town has 640 people. Its population grows by 5%. How many people live there now?
  8. 8.The price of a school bag changes from ₹3660 to ₹4758. By what percent did it go up?
  9. 9.A shop sells 1140 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  10. 10.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  11. 11.A shop sells 900 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  12. 12.The price of a bicycle is ₹2320. It goes up by 15%. What is the new price (in ₹)?
  13. 13.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹1800 to ₹1620. By what percent did it come down?
  15. 15.A town has 3340 people. Its population grows by 30%. How many people live there now?
  16. 16.A water tank holds 4580 litres. 25% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹1120 to ₹1288. By what percent did it go up?
  18. 18.A shop sells 1720 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  19. 19.A water tank holds 3220 litres. 5% of the water is used. How many litres are left?
  20. 20.A town has 1280 people. Its population grows by 15%. How many people live there now?
  21. 21.The price of a school bag changes from ₹880 to ₹528. By what percent did it come down?
  22. 22.A town has 700 people. Its population grows by 15%. How many people live there now?
  23. 23.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A town has 1960 people. Its population grows by 30%. How many people live there now?
  25. 25.The price of a school bag changes from ₹4340 to ₹4774. By what percent did it go up?
  26. 26.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  27. 27.A town has 1940 people. Its population grows by 10%. How many people live there now?
  28. 28.The price of a school bag changes from ₹720 to ₹576. By what percent did it come down?
  29. 29.The price of a bicycle is ₹4040. It goes up by 5%. What is the new price (in ₹)?
  30. 30.The price of a school bag changes from ₹2140 to ₹2782. By what percent did it go up?
  31. 31.A water tank holds 1500 litres. 50% of the water is used. How many litres are left?
  32. 32.A water tank holds 4620 litres. 40% of the water is used. How many litres are left?
  33. 33.A water tank holds 4680 litres. 30% of the water is used. How many litres are left?
  34. 34.A water tank holds 3320 litres. 15% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹3420 to ₹4275. By what percent did it go up?
  36. 36.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  37. 37.A town has 1280 people. Its population grows by 25%. How many people live there now?
  38. 38.A water tank holds 2420 litres. 5% of the water is used. How many litres are left?
  39. 39.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  40. 40.A water tank holds 4540 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 1104
  2. 5104
  3. 5070
  4. 1870
  5. 50
  6. 6240
  7. 672
  8. 30
  9. 1368
  10. 19.25
  11. 990
  12. 2668
  13. 36
  14. 10
  15. 4342
  16. 3435
  17. 15
  18. 2064
  19. 3059
  20. 1472
  21. 40
  22. 805
  23. 87.5
  24. 2548
  25. 10
  26. 57.5
  27. 2134
  28. 20
  29. 4242
  30. 30
  31. 750
  32. 2772
  33. 3276
  34. 2822
  35. 25
  36. 75
  37. 1600
  38. 2299
  39. 5
  40. 4086

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