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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 253 · 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 water tank holds 780 litres. 50% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2080 to ₹1456. By what percent did it come down?
  3. 3.A water tank holds 1420 litres. 50% of the water is used. How many litres are left?
  4. 4.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  5. 5.The price of a school bag changes from ₹3480 to ₹2610. By what percent did it come down?
  6. 6.A water tank holds 3640 litres. 40% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹4540. It goes up by 15%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹2860 to ₹3575. By what percent did it go up?
  9. 9.A shop sells 280 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  10. 10.A water tank holds 4420 litres. 10% of the water is used. How many litres are left?
  11. 11.A town has 280 people. Its population grows by 40%. How many people live there now?
  12. 12.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  13. 13.A water tank holds 4060 litres. 5% of the water is used. How many litres are left?
  14. 14.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹1400 to ₹1050. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹2120 to ₹2650. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹1020 to ₹969. By what percent did it come down?
  18. 18.A shop sells 4140 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹1380 to ₹1587. By what percent did it go up?
  20. 20.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  21. 21.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹2640 to ₹3168. By what percent did it go up?
  23. 23.A town has 320 people. Its population grows by 20%. How many people live there now?
  24. 24.A water tank holds 2900 litres. 40% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹1500. It goes up by 20%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹2460 to ₹2952. By what percent did it go up?
  27. 27.A town has 1100 people. Its population grows by 5%. How many people live there now?
  28. 28.A shop sells 3440 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹4760 to ₹2380. By what percent did it come down?
  30. 30.A water tank holds 2820 litres. 25% of the water is used. How many litres are left?
  31. 31.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  32. 32.The price of a bicycle is ₹2220. It goes up by 10%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹1200 to ₹1020. By what percent did it come down?
  34. 34.A water tank holds 380 litres. 10% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹2380 to ₹2856. By what percent did it go up?
  36. 36.A water tank holds 1760 litres. 15% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹560 to ₹420. By what percent did it come down?
  38. 38.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 4240 litres. 50% of the water is used. How many litres are left?
  40. 40.A shop sells 3100 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?

Answer key

  1. 390
  2. 30
  3. 710
  4. 52
  5. 25
  6. 2184
  7. 5221
  8. 25
  9. 350
  10. 3978
  11. 392
  12. 58
  13. 3857
  14. 26
  15. 25
  16. 25
  17. 5
  18. 4347
  19. 15
  20. 20
  21. 82
  22. 20
  23. 384
  24. 1740
  25. 1800
  26. 20
  27. 1155
  28. 4300
  29. 50
  30. 2115
  31. 24
  32. 2442
  33. 15
  34. 342
  35. 20
  36. 1496
  37. 25
  38. 15.5
  39. 2120
  40. 4030

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