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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 701 · 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.The price of a school bag changes from ₹1740 to ₹1218. By what percent did it come down?
  2. 2.A town has 2180 people. Its population grows by 5%. How many people live there now?
  3. 3.A shop sells 3400 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  4. 4.The price of a bicycle is ₹3040. It goes up by 15%. What is the new price (in ₹)?
  5. 5.A water tank holds 1740 litres. 10% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹400 to ₹280. By what percent did it come down?
  7. 7.A water tank holds 4120 litres. 20% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹680 to ₹782. By what percent did it go up?
  9. 9.A town has 1980 people. Its population grows by 15%. How many people live there now?
  10. 10.A shop sells 240 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  11. 11.A water tank holds 2320 litres. 25% of the water is used. How many litres are left?
  12. 12.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  13. 13.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  14. 14.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹840 to ₹882. By what percent did it go up?
  16. 16.The price of a bicycle is ₹1120. It goes up by 20%. What is the new price (in ₹)?
  17. 17.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  18. 18.A town has 2440 people. Its population grows by 5%. How many people live there now?
  19. 19.A water tank holds 3220 litres. 25% of the water is used. How many litres are left?
  20. 20.The price of a bicycle is ₹2760. It goes up by 50%. What is the new price (in ₹)?
  21. 21.A water tank holds 3400 litres. 5% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹3640 to ₹3822. By what percent did it go up?
  23. 23.The price of a bicycle is ₹1380. It goes up by 40%. What is the new price (in ₹)?
  24. 24.A shop sells 3380 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  25. 25.A water tank holds 1400 litres. 5% of the water is used. How many litres are left?
  26. 26.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  27. 27.A water tank holds 2780 litres. 10% of the water is used. How many litres are left?
  28. 28.A water tank holds 3360 litres. 25% of the water is used. How many litres are left?
  29. 29.A water tank holds 4600 litres. 5% of the water is used. How many litres are left?
  30. 30.A town has 3220 people. Its population grows by 30%. How many people live there now?
  31. 31.The price of a bicycle is ₹3720. It goes up by 40%. What is the new price (in ₹)?
  32. 32.A water tank holds 3760 litres. 20% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹2260 to ₹3390. By what percent did it go up?
  34. 34.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  35. 35.The price of a school bag changes from ₹1600 to ₹1200. By what percent did it come down?
  36. 36.A town has 3020 people. Its population grows by 30%. How many people live there now?
  37. 37.A water tank holds 380 litres. 5% of the water is used. How many litres are left?
  38. 38.A water tank holds 3020 litres. 15% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹560 to ₹588. By what percent did it go up?
  40. 40.The price of a school bag changes from ₹1200 to ₹1440. By what percent did it go up?

Answer key

  1. 30
  2. 2289
  3. 4760
  4. 3496
  5. 1566
  6. 30
  7. 3296
  8. 15
  9. 2277
  10. 252
  11. 1740
  12. 31.25
  13. 24
  14. 40.5
  15. 5
  16. 1344
  17. 36.25
  18. 2562
  19. 2415
  20. 4140
  21. 3230
  22. 5
  23. 1932
  24. 4056
  25. 1330
  26. 5
  27. 2502
  28. 2520
  29. 4370
  30. 4186
  31. 5208
  32. 3008
  33. 50
  34. 52.5
  35. 25
  36. 3926
  37. 361
  38. 2567
  39. 5
  40. 20

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