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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 979 · 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 comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  2. 2.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  3. 3.A town has 580 people. Its population grows by 30%. How many people live there now?
  4. 4.A water tank holds 4420 litres. 5% of the water is used. How many litres are left?
  5. 5.A water tank holds 2560 litres. 25% of the water is used. How many litres are left?
  6. 6.A shop sells 1960 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  7. 7.A water tank holds 2480 litres. 50% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹2080 to ₹2184. By what percent did it go up?
  9. 9.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹4940 to ₹4446. By what percent did it come down?
  11. 11.The price of a bicycle is ₹1140. It goes up by 20%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹1420 to ₹1207. By what percent did it come down?
  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.A water tank holds 340 litres. 10% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹560 to ₹504. By what percent did it come down?
  16. 16.A shop sells 3480 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  17. 17.A water tank holds 380 litres. 5% of the water is used. How many litres are left?
  18. 18.A water tank holds 3680 litres. 10% of the water is used. How many litres are left?
  19. 19.A water tank holds 2320 litres. 25% of the water is used. How many litres are left?
  20. 20.A shop sells 2680 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  21. 21.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  22. 22.The price of a bicycle is ₹1040. It goes up by 40%. What is the new price (in ₹)?
  23. 23.A shop sells 360 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  24. 24.The price of a bicycle is ₹1860. It goes up by 20%. What is the new price (in ₹)?
  25. 25.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹2480 to ₹3224. By what percent did it go up?
  27. 27.The price of a bicycle is ₹1860. It goes up by 30%. What is the new price (in ₹)?
  28. 28.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  29. 29.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  30. 30.A water tank holds 4240 litres. 20% of the water is used. How many litres are left?
  31. 31.A water tank holds 5000 litres. 10% of the water is used. How many litres are left?
  32. 32.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  33. 33.A shop sells 3860 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  34. 34.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹4680. It goes up by 10%. What is the new price (in ₹)?
  36. 36.A water tank holds 200 litres. 20% of the water is used. How many litres are left?
  37. 37.A water tank holds 3360 litres. 40% of the water is used. How many litres are left?
  38. 38.A town has 1820 people. Its population grows by 10%. How many people live there now?
  39. 39.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹1660 to ₹830. By what percent did it come down?

Answer key

  1. 43.75
  2. 37.5
  3. 754
  4. 4199
  5. 1920
  6. 2548
  7. 1240
  8. 5
  9. 32
  10. 10
  11. 1368
  12. 15
  13. 36
  14. 306
  15. 10
  16. 4524
  17. 361
  18. 3312
  19. 1740
  20. 3484
  21. 10.25
  22. 1456
  23. 378
  24. 2232
  25. 5
  26. 30
  27. 2418
  28. 40
  29. 14
  30. 3392
  31. 4500
  32. 55
  33. 4053
  34. 14.5
  35. 5148
  36. 160
  37. 2016
  38. 2002
  39. 3.5
  40. 50

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