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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 491 · 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 660 people. Its population grows by 15%. How many people live there now?
  2. 2.A town has 4800 people. Its population grows by 10%. How many people live there now?
  3. 3.A shop sells 4560 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  4. 4.A water tank holds 1200 litres. 25% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹620 to ₹806. By what percent did it go up?
  6. 6.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  7. 7.A water tank holds 3340 litres. 25% of the water is used. How many litres are left?
  8. 8.A water tank holds 2460 litres. 5% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹2360 to ₹2242. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹680 to ₹1020. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹100 to ₹120. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹1120 to ₹1568. By what percent did it go up?
  13. 13.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  14. 14.A town has 1960 people. Its population grows by 15%. How many people live there now?
  15. 15.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹2200 to ₹3080. By what percent did it go up?
  17. 17.The price of a bicycle is ₹1960. It goes up by 30%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹1640 to ₹1312. By what percent did it come down?
  19. 19.A water tank holds 3380 litres. 25% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹3440 to ₹4816. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹3380 to ₹3211. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹580 to ₹522. By what percent did it come down?
  23. 23.A shop sells 2760 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  24. 24.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  25. 25.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹2180 to ₹2289. By what percent did it go up?
  27. 27.A town has 3080 people. Its population grows by 50%. How many people live there now?
  28. 28.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 2740 litres. 15% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹2580. It goes up by 30%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹3980 to ₹2786. By what percent did it come down?
  32. 32.A shop sells 1740 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  33. 33.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 2080 litres. 30% of the water is used. How many litres are left?
  35. 35.A water tank holds 1460 litres. 25% of the water is used. How many litres are left?
  36. 36.A shop sells 280 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  37. 37.The price of a bicycle is ₹440. It goes up by 40%. What is the new price (in ₹)?
  38. 38.The price of a bicycle is ₹1280. It goes up by 10%. What is the new price (in ₹)?
  39. 39.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  40. 40.A town has 4760 people. Its population grows by 20%. How many people live there now?

Answer key

  1. 759
  2. 5280
  3. 5700
  4. 900
  5. 30
  6. 65
  7. 2505
  8. 2337
  9. 5
  10. 50
  11. 20
  12. 40
  13. 26
  14. 2254
  15. 125
  16. 40
  17. 2548
  18. 20
  19. 2535
  20. 40
  21. 5
  22. 10
  23. 3312
  24. 52.5
  25. 5
  26. 5
  27. 4620
  28. 15.5
  29. 2329
  30. 3354
  31. 30
  32. 1914
  33. 57.5
  34. 1456
  35. 1095
  36. 308
  37. 616
  38. 1408
  39. 38
  40. 5712

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