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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 521 · 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 50% and then comes down by 5%. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹4920 to ₹5412. By what percent did it go up?
  3. 3.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 1260 litres. 25% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹380 to ₹418. By what percent did it go up?
  6. 6.A water tank holds 860 litres. 10% of the water is used. How many litres are left?
  7. 7.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  8. 8.A town has 3740 people. Its population grows by 40%. How many people live there now?
  9. 9.A shop sells 4960 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  10. 10.The price of a school bag changes from ₹3400 to ₹4760. By what percent did it go up?
  11. 11.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  12. 12.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹1280 to ₹1472. By what percent did it go up?
  14. 14.The price of a bicycle is ₹340. It goes up by 30%. What is the new price (in ₹)?
  15. 15.The price of a bicycle is ₹4160. It goes up by 25%. What is the new price (in ₹)?
  16. 16.A shop sells 2400 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹3680 to ₹3496. By what percent did it come down?
  18. 18.The price of a bicycle is ₹920. It goes up by 15%. What is the new price (in ₹)?
  19. 19.A water tank holds 1000 litres. 15% of the water is used. How many litres are left?
  20. 20.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹1900 to ₹2470. By what percent did it go up?
  22. 22.A water tank holds 2060 litres. 5% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹980 to ₹1127. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹3240 to ₹3564. By what percent did it go up?
  25. 25.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹4720. It goes up by 5%. What is the new price (in ₹)?
  27. 27.A town has 2900 people. Its population grows by 5%. How many people live there now?
  28. 28.The price of a bicycle is ₹4120. It goes up by 40%. What is the new price (in ₹)?
  29. 29.A water tank holds 1320 litres. 30% of the water is used. How many litres are left?
  30. 30.A town has 3700 people. Its population grows by 30%. How many people live there now?
  31. 31.The price of a bicycle is ₹1120. It goes up by 15%. What is the new price (in ₹)?
  32. 32.A water tank holds 4540 litres. 5% of the water is used. How many litres are left?
  33. 33.A shop sells 1220 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  34. 34.A water tank holds 2760 litres. 50% of the water is used. How many litres are left?
  35. 35.A water tank holds 80 litres. 30% of the water is used. How many litres are left?
  36. 36.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹3580 to ₹4654. By what percent did it go up?
  38. 38.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  39. 39.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  40. 40.A shop sells 1440 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?

Answer key

  1. 42.5
  2. 10
  3. 80
  4. 945
  5. 10
  6. 774
  7. 20
  8. 5236
  9. 6200
  10. 40
  11. 82
  12. 37.5
  13. 15
  14. 442
  15. 5200
  16. 3000
  17. 5
  18. 1058
  19. 850
  20. 26.5
  21. 30
  22. 1957
  23. 15
  24. 10
  25. 12.5
  26. 4956
  27. 3045
  28. 5768
  29. 924
  30. 4810
  31. 1288
  32. 4313
  33. 1281
  34. 1380
  35. 56
  36. 12
  37. 30
  38. 3.5
  39. 55
  40. 1512

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