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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 539 · 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 bicycle is ₹4580. It goes up by 10%. What is the new price (in ₹)?
  2. 2.A water tank holds 320 litres. 15% of the water is used. How many litres are left?
  3. 3.A shop sells 4520 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  4. 4.A water tank holds 2480 litres. 10% of the water is used. How many litres are left?
  5. 5.A shop sells 3760 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  6. 6.A water tank holds 1820 litres. 25% of the water is used. How many litres are left?
  7. 7.A town has 600 people. Its population grows by 20%. How many people live there now?
  8. 8.The price of a school bag changes from ₹4940 to ₹5928. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹1580 to ₹790. By what percent did it come down?
  10. 10.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  11. 11.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  12. 12.A water tank holds 2040 litres. 10% of the water is used. How many litres are left?
  13. 13.A town has 2300 people. Its population grows by 15%. How many people live there now?
  14. 14.A water tank holds 2100 litres. 25% of the water is used. How many litres are left?
  15. 15.A water tank holds 2640 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹4180 to ₹4807. By what percent did it go up?
  17. 17.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹860. It goes up by 25%. What is the new price (in ₹)?
  19. 19.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 1180 litres. 50% of the water is used. How many litres are left?
  21. 21.A town has 200 people. Its population grows by 15%. How many people live there now?
  22. 22.A water tank holds 3060 litres. 10% of the water is used. How many litres are left?
  23. 23.A town has 1940 people. Its population grows by 15%. How many people live there now?
  24. 24.A shop sells 800 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  25. 25.A water tank holds 440 litres. 40% of the water is used. How many litres are left?
  26. 26.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  27. 27.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  28. 28.A water tank holds 1140 litres. 15% of the water is used. How many litres are left?
  29. 29.A water tank holds 1520 litres. 15% of the water is used. How many litres are left?
  30. 30.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹2880 to ₹4032. By what percent did it go up?
  32. 32.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  33. 33.The price of a bicycle is ₹4080. It goes up by 25%. What is the new price (in ₹)?
  34. 34.A water tank holds 4160 litres. 5% of the water is used. How many litres are left?
  35. 35.A shop sells 2300 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹1400 to ₹1750. By what percent did it go up?
  37. 37.A water tank holds 3520 litres. 20% of the water is used. How many litres are left?
  38. 38.A town has 960 people. Its population grows by 50%. How many people live there now?
  39. 39.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 2680 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 5038
  2. 272
  3. 5198
  4. 2232
  5. 4700
  6. 1365
  7. 720
  8. 20
  9. 50
  10. 4.5
  11. 36.25
  12. 1836
  13. 2645
  14. 1575
  15. 2508
  16. 15
  17. 15.5
  18. 1075
  19. 75
  20. 590
  21. 230
  22. 2754
  23. 2231
  24. 920
  25. 264
  26. 62.5
  27. 46
  28. 969
  29. 1292
  30. 65
  31. 40
  32. 55
  33. 5100
  34. 3952
  35. 2875
  36. 25
  37. 2816
  38. 1440
  39. 43
  40. 1876

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