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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 456 · 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 goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹3480 to ₹4524. By what percent did it go up?
  3. 3.The price of a bicycle is ₹220. It goes up by 30%. What is the new price (in ₹)?
  4. 4.A shop sells 2580 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹2800 to ₹1400. By what percent did it come down?
  6. 6.A water tank holds 3340 litres. 50% of the water is used. How many litres are left?
  7. 7.A water tank holds 2680 litres. 20% of the water is used. How many litres are left?
  8. 8.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹4440 to ₹2664. By what percent did it come down?
  10. 10.A water tank holds 4540 litres. 5% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹660 to ₹858. By what percent did it go up?
  12. 12.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹4600 to ₹6900. By what percent did it go up?
  14. 14.A shop sells 3300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹1020 to ₹1326. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹3140 to ₹3768. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹1180 to ₹1121. By what percent did it come down?
  18. 18.A town has 980 people. Its population grows by 50%. How many people live there now?
  19. 19.A water tank holds 1100 litres. 10% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹1000 to ₹1300. By what percent did it go up?
  21. 21.A water tank holds 620 litres. 40% of the water is used. How many litres are left?
  22. 22.A water tank holds 3540 litres. 40% of the water is used. How many litres are left?
  23. 23.A town has 3160 people. Its population grows by 50%. How many people live there now?
  24. 24.The price of a bicycle is ₹3500. It goes up by 30%. What is the new price (in ₹)?
  25. 25.The price of a bicycle is ₹2540. It goes up by 15%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹4020 to ₹3015. By what percent did it come down?
  27. 27.A town has 1420 people. Its population grows by 15%. How many people live there now?
  28. 28.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹3400 to ₹4250. By what percent did it go up?
  30. 30.The price of a bicycle is ₹440. It goes up by 10%. What is the new price (in ₹)?
  31. 31.A water tank holds 2600 litres. 15% of the water is used. How many litres are left?
  32. 32.A town has 3780 people. Its population grows by 25%. How many people live there now?
  33. 33.The price of a school bag changes from ₹4780 to ₹5736. By what percent did it go up?
  34. 34.The price of a bicycle is ₹220. It goes up by 5%. What is the new price (in ₹)?
  35. 35.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  36. 36.The price of a bicycle is ₹3080. It goes up by 20%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹380 to ₹570. By what percent did it go up?
  38. 38.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹3680 to ₹2576. By what percent did it come down?
  40. 40.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 36.5
  2. 30
  3. 286
  4. 2967
  5. 50
  6. 1670
  7. 2144
  8. 6.25
  9. 40
  10. 4313
  11. 30
  12. 56
  13. 50
  14. 3960
  15. 30
  16. 20
  17. 5
  18. 1470
  19. 990
  20. 30
  21. 372
  22. 2124
  23. 4740
  24. 4550
  25. 2921
  26. 25
  27. 1633
  28. 26
  29. 25
  30. 484
  31. 2210
  32. 4725
  33. 20
  34. 231
  35. 96
  36. 3696
  37. 50
  38. 37.5
  39. 30
  40. 21

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