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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 55 · 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 goes up by 25% more. By what percent has it gone up in all? =
  2. 2.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 2840 litres. 20% of the water is used. How many litres are left?
  4. 4.A town has 3160 people. Its population grows by 50%. How many people live there now?
  5. 5.The price of a school bag changes from ₹4780 to ₹5975. By what percent did it go up?
  6. 6.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  7. 7.A town has 2100 people. Its population grows by 15%. How many people live there now?
  8. 8.A water tank holds 1420 litres. 25% of the water is used. How many litres are left?
  9. 9.A shop sells 1860 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  10. 10.A town has 3680 people. Its population grows by 40%. How many people live there now?
  11. 11.A water tank holds 320 litres. 30% of the water is used. How many litres are left?
  12. 12.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹1480 to ₹1258. By what percent did it come down?
  14. 14.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹1120 to ₹1680. By what percent did it go up?
  16. 16.A water tank holds 1380 litres. 30% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3260 to ₹3749. By what percent did it go up?
  18. 18.A town has 2360 people. Its population grows by 40%. How many people live there now?
  19. 19.A water tank holds 3280 litres. 25% of the water is used. How many litres are left?
  20. 20.A town has 2140 people. Its population grows by 15%. How many people live there now?
  21. 21.A water tank holds 2180 litres. 15% of the water is used. How many litres are left?
  22. 22.A water tank holds 1620 litres. 40% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹2380 to ₹2856. By what percent did it go up?
  24. 24.A water tank holds 220 litres. 15% of the water is used. How many litres are left?
  25. 25.A shop sells 4280 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  26. 26.A water tank holds 2440 litres. 50% of the water is used. How many litres are left?
  27. 27.A water tank holds 4120 litres. 40% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹2980 to ₹2682. By what percent did it come down?
  29. 29.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  30. 30.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  31. 31.A water tank holds 4220 litres. 50% of the water is used. How many litres are left?
  32. 32.A water tank holds 2300 litres. 10% of the water is used. How many litres are left?
  33. 33.A water tank holds 2620 litres. 20% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹4300 to ₹4945. By what percent did it go up?
  35. 35.A town has 1660 people. Its population grows by 15%. How many people live there now?
  36. 36.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  37. 37.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  38. 38.The price of a bicycle is ₹2140. It goes up by 50%. What is the new price (in ₹)?
  39. 39.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  40. 40.A water tank holds 3260 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 62.5
  2. 65
  3. 2272
  4. 4740
  5. 25
  6. 27.5
  7. 2415
  8. 1065
  9. 1953
  10. 5152
  11. 224
  12. 49.5
  13. 15
  14. 82
  15. 50
  16. 966
  17. 15
  18. 3304
  19. 2460
  20. 2461
  21. 1853
  22. 972
  23. 20
  24. 187
  25. 4494
  26. 1220
  27. 2472
  28. 10
  29. 23.5
  30. 70
  31. 2110
  32. 2070
  33. 2096
  34. 15
  35. 1909
  36. 65
  37. 12
  38. 3210
  39. 58
  40. 1956

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