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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 212 · 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 ₹2760 to ₹1380. By what percent did it come down?
  2. 2.The price of a school bag changes from ₹2160 to ₹2700. By what percent did it go up?
  3. 3.A water tank holds 1440 litres. 15% of the water is used. How many litres are left?
  4. 4.A shop sells 3160 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  5. 5.A water tank holds 1020 litres. 40% of the water is used. How many litres are left?
  6. 6.A town has 4540 people. Its population grows by 5%. How many people live there now?
  7. 7.A town has 4720 people. Its population grows by 5%. How many people live there now?
  8. 8.The price of a school bag changes from ₹3800 to ₹3990. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹2500 to ₹2625. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹3000 to ₹1800. By what percent did it come down?
  11. 11.A water tank holds 2360 litres. 30% of the water is used. How many litres are left?
  12. 12.A water tank holds 3040 litres. 25% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹5000 to ₹3000. By what percent did it come down?
  14. 14.A water tank holds 2240 litres. 15% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹3040 to ₹2584. By what percent did it come down?
  16. 16.A water tank holds 1100 litres. 5% of the water is used. How many litres are left?
  17. 17.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  18. 18.A water tank holds 1200 litres. 20% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹2420 to ₹2662. By what percent did it go up?
  20. 20.A water tank holds 3420 litres. 50% of the water is used. How many litres are left?
  21. 21.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  22. 22.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹2640. It goes up by 20%. What is the new price (in ₹)?
  24. 24.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 2040 litres. 25% of the water is used. How many litres are left?
  26. 26.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  27. 27.A town has 220 people. Its population grows by 15%. How many people live there now?
  28. 28.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  29. 29.A shop sells 2960 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  30. 30.A water tank holds 120 litres. 5% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹220 to ₹231. By what percent did it go up?
  32. 32.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  33. 33.A water tank holds 2180 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹4420 to ₹5525. By what percent did it go up?
  35. 35.A shop sells 2260 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  36. 36.A town has 3660 people. Its population grows by 10%. How many people live there now?
  37. 37.A shop sells 4000 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  38. 38.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹2480 to ₹1736. By what percent did it come down?
  40. 40.A water tank holds 640 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 50
  2. 25
  3. 1224
  4. 3318
  5. 612
  6. 4767
  7. 4956
  8. 5
  9. 5
  10. 40
  11. 1652
  12. 2280
  13. 40
  14. 1904
  15. 15
  16. 1045
  17. 9.75
  18. 960
  19. 10
  20. 1710
  21. 64
  22. 54
  23. 3168
  24. 36.5
  25. 1530
  26. 46
  27. 253
  28. 24
  29. 4144
  30. 114
  31. 5
  32. 68
  33. 1635
  34. 25
  35. 2373
  36. 4026
  37. 5000
  38. 26
  39. 30
  40. 480

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