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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 923 · 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 1960 litres. 40% of the water is used. How many litres are left?
  2. 2.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  3. 3.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  4. 4.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹3300 to ₹3135. By what percent did it come down?
  6. 6.A town has 3120 people. Its population grows by 40%. How many people live there now?
  7. 7.The price of a school bag changes from ₹280 to ₹308. By what percent did it go up?
  8. 8.A town has 2960 people. Its population grows by 40%. How many people live there now?
  9. 9.A water tank holds 540 litres. 10% of the water is used. How many litres are left?
  10. 10.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  11. 11.A water tank holds 3020 litres. 5% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹340 to ₹374. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹4100 to ₹5330. By what percent did it go up?
  14. 14.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  15. 15.A water tank holds 1220 litres. 40% of the water is used. How many litres are left?
  16. 16.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹3600. It goes up by 15%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹4760 to ₹6188. By what percent did it go up?
  19. 19.The price of a bicycle is ₹480. It goes up by 20%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹2360 to ₹2124. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹1380 to ₹1035. By what percent did it come down?
  22. 22.A town has 1060 people. Its population grows by 30%. How many people live there now?
  23. 23.The price of a school bag changes from ₹1760 to ₹2464. By what percent did it go up?
  24. 24.A town has 4740 people. Its population grows by 50%. How many people live there now?
  25. 25.A water tank holds 4240 litres. 5% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹2620 to ₹3275. By what percent did it go up?
  27. 27.A town has 3740 people. Its population grows by 30%. How many people live there now?
  28. 28.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹200 to ₹120. By what percent did it come down?
  30. 30.The price of a bicycle is ₹5000. It goes up by 15%. What is the new price (in ₹)?
  31. 31.A water tank holds 2780 litres. 30% of the water is used. How many litres are left?
  32. 32.A town has 120 people. Its population grows by 20%. How many people live there now?
  33. 33.A shop sells 4320 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  34. 34.A water tank holds 3620 litres. 20% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹3540 to ₹4248. By what percent did it go up?
  36. 36.A shop sells 4320 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  37. 37.A town has 880 people. Its population grows by 20%. How many people live there now?
  38. 38.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  39. 39.A shop sells 4180 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹2140 to ₹2033. By what percent did it come down?

Answer key

  1. 1176
  2. 61
  3. 52
  4. 50
  5. 5
  6. 4368
  7. 10
  8. 4144
  9. 486
  10. 33.5
  11. 2869
  12. 10
  13. 30
  14. 24
  15. 732
  16. 37.5
  17. 4140
  18. 30
  19. 576
  20. 10
  21. 25
  22. 1378
  23. 40
  24. 7110
  25. 4028
  26. 25
  27. 4862
  28. 26.5
  29. 40
  30. 5750
  31. 1946
  32. 144
  33. 6048
  34. 2896
  35. 20
  36. 5184
  37. 1056
  38. 55
  39. 5434
  40. 5

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