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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 772 · 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 ₹4320 to ₹4104. By what percent did it come down?
  2. 2.A town has 780 people. Its population grows by 20%. How many people live there now?
  3. 3.A town has 860 people. Its population grows by 30%. How many people live there now?
  4. 4.A water tank holds 3240 litres. 30% of the water is used. How many litres are left?
  5. 5.A water tank holds 2660 litres. 40% of the water is used. How many litres are left?
  6. 6.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  7. 7.The price of a bicycle is ₹800. It goes up by 25%. What is the new price (in ₹)?
  8. 8.A shop sells 2880 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  9. 9.A shop sells 2120 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  10. 10.The price of a school bag changes from ₹1280 to ₹1024. By what percent did it come down?
  11. 11.A shop sells 100 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  12. 12.The price of a school bag changes from ₹1260 to ₹1575. By what percent did it go up?
  13. 13.A town has 560 people. Its population grows by 10%. How many people live there now?
  14. 14.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  15. 15.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  16. 16.A water tank holds 280 litres. 20% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹4900 to ₹6125. By what percent did it go up?
  18. 18.A town has 1180 people. Its population grows by 10%. How many people live there now?
  19. 19.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  20. 20.A water tank holds 4160 litres. 30% of the water is used. How many litres are left?
  21. 21.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  22. 22.A shop sells 340 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  23. 23.A water tank holds 1400 litres. 30% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹4440. It goes up by 5%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹4080 to ₹3264. By what percent did it come down?
  26. 26.The price of a school bag changes from ₹4600 to ₹5750. By what percent did it go up?
  27. 27.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  28. 28.The price of a bicycle is ₹2040. It goes up by 10%. What is the new price (in ₹)?
  29. 29.A water tank holds 2660 litres. 15% of the water is used. How many litres are left?
  30. 30.A water tank holds 1020 litres. 5% of the water is used. How many litres are left?
  31. 31.A shop sells 3340 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  32. 32.A town has 1840 people. Its population grows by 40%. How many people live there now?
  33. 33.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹1540 to ₹1848. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹3220 to ₹1932. By what percent did it come down?
  36. 36.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 1680 litres. 10% of the water is used. How many litres are left?
  38. 38.A water tank holds 1760 litres. 40% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹1540. It goes up by 10%. What is the new price (in ₹)?
  40. 40.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =

Answer key

  1. 5
  2. 936
  3. 1118
  4. 2268
  5. 1596
  6. 4.5
  7. 1000
  8. 3744
  9. 2968
  10. 20
  11. 150
  12. 25
  13. 616
  14. 10.25
  15. 36.25
  16. 224
  17. 25
  18. 1298
  19. 792
  20. 2912
  21. 26
  22. 357
  23. 980
  24. 4662
  25. 20
  26. 25
  27. 70
  28. 2244
  29. 2261
  30. 969
  31. 4175
  32. 2576
  33. 32
  34. 20
  35. 40
  36. 72.5
  37. 1512
  38. 1056
  39. 1694
  40. 68

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