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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 936 · 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 ₹4720 to ₹5192. By what percent did it go up?
  2. 2.A water tank holds 4360 litres. 20% of the water is used. How many litres are left?
  3. 3.A town has 1160 people. Its population grows by 10%. How many people live there now?
  4. 4.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹4960 to ₹6200. By what percent did it go up?
  6. 6.A shop sells 3540 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  7. 7.The price of a bicycle is ₹4400. It goes up by 20%. What is the new price (in ₹)?
  8. 8.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 400 litres. 5% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹3340 to ₹3674. By what percent did it go up?
  11. 11.The price of a bicycle is ₹2100. It goes up by 10%. What is the new price (in ₹)?
  12. 12.A town has 3840 people. Its population grows by 15%. How many people live there now?
  13. 13.The price of a school bag changes from ₹1460 to ₹730. By what percent did it come down?
  14. 14.A shop sells 3140 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  15. 15.A water tank holds 2760 litres. 25% of the water is used. How many litres are left?
  16. 16.A town has 3060 people. Its population grows by 15%. How many people live there now?
  17. 17.A town has 2300 people. Its population grows by 25%. How many people live there now?
  18. 18.The price of a school bag changes from ₹4140 to ₹4761. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹420 to ₹336. By what percent did it come down?
  20. 20.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  21. 21.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  22. 22.The price of a bicycle is ₹2280. It goes up by 15%. What is the new price (in ₹)?
  23. 23.A shop sells 400 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹1020 to ₹1275. By what percent did it go up?
  25. 25.A town has 580 people. Its population grows by 10%. How many people live there now?
  26. 26.A water tank holds 2700 litres. 40% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹4860. It goes up by 20%. What is the new price (in ₹)?
  28. 28.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  29. 29.A town has 3720 people. Its population grows by 10%. How many people live there now?
  30. 30.The price of a bicycle is ₹3680. It goes up by 15%. What is the new price (in ₹)?
  31. 31.A town has 3960 people. Its population grows by 20%. How many people live there now?
  32. 32.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹1620 to ₹1539. By what percent did it come down?
  34. 34.A water tank holds 1460 litres. 25% of the water is used. How many litres are left?
  35. 35.A shop sells 60 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 3360 litres. 5% of the water is used. How many litres are left?
  38. 38.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  39. 39.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  40. 40.A water tank holds 420 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 10
  2. 3488
  3. 1276
  4. 23.5
  5. 25
  6. 4248
  7. 5280
  8. 49.5
  9. 380
  10. 10
  11. 2310
  12. 4416
  13. 50
  14. 4710
  15. 2070
  16. 3519
  17. 2875
  18. 15
  19. 20
  20. 55
  21. 19.25
  22. 2622
  23. 600
  24. 25
  25. 638
  26. 1620
  27. 5832
  28. 50
  29. 4092
  30. 4232
  31. 4752
  32. 56
  33. 5
  34. 1095
  35. 69
  36. 82
  37. 3192
  38. 56
  39. 52.5
  40. 378

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