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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 665 · 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 comes down by 5%. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹1400 to ₹1190. By what percent did it come down?
  3. 3.A water tank holds 560 litres. 20% of the water is used. How many litres are left?
  4. 4.The price of a bicycle is ₹2220. It goes up by 5%. What is the new price (in ₹)?
  5. 5.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 4480 litres. 40% 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 water tank holds 2460 litres. 10% of the water is used. How many litres are left?
  9. 9.A town has 3920 people. Its population grows by 20%. How many people live there now?
  10. 10.The price of a school bag changes from ₹140 to ₹84. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹3580 to ₹2148. By what percent did it come down?
  12. 12.A town has 2200 people. Its population grows by 20%. How many people live there now?
  13. 13.A water tank holds 2000 litres. 40% of the water is used. How many litres are left?
  14. 14.A water tank holds 1140 litres. 10% of the water is used. How many litres are left?
  15. 15.A town has 3520 people. Its population grows by 20%. How many people live there now?
  16. 16.A water tank holds 2300 litres. 30% of the water is used. How many litres are left?
  17. 17.A water tank holds 4140 litres. 15% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹2540 to ₹3810. By what percent did it go up?
  19. 19.A water tank holds 4260 litres. 20% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹760 to ₹1064. By what percent did it go up?
  21. 21.A water tank holds 4800 litres. 50% of the water is used. How many litres are left?
  22. 22.A water tank holds 3780 litres. 10% of the water is used. How many litres are left?
  23. 23.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  24. 24.A town has 1580 people. Its population grows by 15%. How many people live there now?
  25. 25.The price of a school bag changes from ₹1480 to ₹1850. By what percent did it go up?
  26. 26.The price of a bicycle is ₹420. It goes up by 15%. What is the new price (in ₹)?
  27. 27.A water tank holds 3120 litres. 30% of the water is used. How many litres are left?
  28. 28.A water tank holds 240 litres. 25% of the water is used. How many litres are left?
  29. 29.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹1120 to ₹1008. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹2880 to ₹2448. By what percent did it come down?
  32. 32.A water tank holds 4400 litres. 30% of the water is used. How many litres are left?
  33. 33.A town has 800 people. Its population grows by 40%. How many people live there now?
  34. 34.A water tank holds 920 litres. 40% of the water is used. How many litres are left?
  35. 35.A water tank holds 4040 litres. 30% of the water is used. How many litres are left?
  36. 36.A water tank holds 2260 litres. 10% of the water is used. How many litres are left?
  37. 37.A town has 4820 people. Its population grows by 5%. How many people live there now?
  38. 38.The price of a school bag changes from ₹4240 to ₹4876. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹3020 to ₹1510. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹4300 to ₹4730. By what percent did it go up?

Answer key

  1. 23.5
  2. 15
  3. 448
  4. 2331
  5. 37.5
  6. 2688
  7. 20
  8. 2214
  9. 4704
  10. 40
  11. 40
  12. 2640
  13. 1200
  14. 1026
  15. 4224
  16. 1610
  17. 3519
  18. 50
  19. 3408
  20. 40
  21. 2400
  22. 3402
  23. 64
  24. 1817
  25. 25
  26. 483
  27. 2184
  28. 180
  29. 69
  30. 10
  31. 15
  32. 3080
  33. 1120
  34. 552
  35. 2828
  36. 2034
  37. 5061
  38. 15
  39. 50
  40. 10

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