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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 309 · 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 1020 litres. 5% of the water is used. How many litres are left?
  2. 2.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹2620 to ₹3275. By what percent did it go up?
  4. 4.A town has 3180 people. Its population grows by 25%. How many people live there now?
  5. 5.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 1100 litres. 40% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹900. It goes up by 20%. What is the new price (in ₹)?
  8. 8.A water tank holds 400 litres. 10% of the water is used. How many litres are left?
  9. 9.A town has 4040 people. Its population grows by 10%. How many people live there now?
  10. 10.A water tank holds 700 litres. 15% of the water is used. How many litres are left?
  11. 11.A water tank holds 3400 litres. 25% of the water is used. How many litres are left?
  12. 12.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  13. 13.The price of a bicycle is ₹3080. It goes up by 50%. What is the new price (in ₹)?
  14. 14.A water tank holds 3920 litres. 20% of the water is used. How many litres are left?
  15. 15.A water tank holds 780 litres. 10% of the water is used. How many litres are left?
  16. 16.A shop sells 3240 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  17. 17.A shop sells 1760 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  18. 18.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  19. 19.A water tank holds 380 litres. 40% of the water is used. How many litres are left?
  20. 20.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  21. 21.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  22. 22.A water tank holds 3020 litres. 25% of the water is used. How many litres are left?
  23. 23.A shop sells 2960 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  24. 24.A water tank holds 800 litres. 5% of the water is used. How many litres are left?
  25. 25.A water tank holds 2080 litres. 10% of the water is used. How many litres are left?
  26. 26.A town has 1600 people. Its population grows by 5%. How many people live there now?
  27. 27.A water tank holds 3060 litres. 50% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹3820 to ₹5730. By what percent did it go up?
  29. 29.A water tank holds 2980 litres. 50% of the water is used. How many litres are left?
  30. 30.A town has 2640 people. Its population grows by 25%. How many people live there now?
  31. 31.A water tank holds 1680 litres. 10% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹1600 to ₹1280. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹4660 to ₹2330. By what percent did it come down?
  34. 34.A water tank holds 1560 litres. 20% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹2120 to ₹2544. By what percent did it go up?
  36. 36.A town has 1000 people. Its population grows by 50%. How many people live there now?
  37. 37.A water tank holds 660 litres. 20% of the water is used. How many litres are left?
  38. 38.A shop sells 1840 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  39. 39.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  40. 40.A water tank holds 4760 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 969
  2. 82
  3. 25
  4. 3975
  5. 32.25
  6. 660
  7. 1080
  8. 360
  9. 4444
  10. 595
  11. 2550
  12. 52.5
  13. 4620
  14. 3136
  15. 702
  16. 3402
  17. 2464
  18. 4
  19. 228
  20. 24
  21. 55
  22. 2265
  23. 3256
  24. 760
  25. 1872
  26. 1680
  27. 1530
  28. 50
  29. 1490
  30. 3300
  31. 1512
  32. 20
  33. 50
  34. 1248
  35. 20
  36. 1500
  37. 528
  38. 2208
  39. 20
  40. 4284

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