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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 80 · 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 4500 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹3060 to ₹3672. By what percent did it go up?
  3. 3.A water tank holds 3860 litres. 5% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹4260 to ₹3621. By what percent did it come down?
  5. 5.A water tank holds 2160 litres. 30% of the water is used. How many litres are left?
  6. 6.A water tank holds 2520 litres. 25% of the water is used. How many litres are left?
  7. 7.A shop sells 3960 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  8. 8.The price of a school bag changes from ₹460 to ₹391. By what percent did it come down?
  9. 9.The price of a bicycle is ₹3500. It goes up by 20%. What is the new price (in ₹)?
  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 30% and then comes down by 15% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹2000 to ₹1700. By what percent did it come down?
  13. 13.A water tank holds 760 litres. 40% of the water is used. How many litres are left?
  14. 14.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹960. It goes up by 15%. What is the new price (in ₹)?
  16. 16.A water tank holds 1980 litres. 15% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹900. It goes up by 15%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹2420 to ₹1936. By what percent did it come down?
  19. 19.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 1480 litres. 50% of the water is used. How many litres are left?
  21. 21.A water tank holds 860 litres. 25% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹4140 to ₹4554. By what percent did it go up?
  23. 23.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  24. 24.The price of a school bag changes from ₹2500 to ₹2375. By what percent did it come down?
  25. 25.A water tank holds 1240 litres. 50% of the water is used. How many litres are left?
  26. 26.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  27. 27.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  28. 28.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  29. 29.A water tank holds 3980 litres. 5% of the water is used. How many litres are left?
  30. 30.A shop sells 720 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  31. 31.A shop sells 960 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  32. 32.A water tank holds 2140 litres. 50% of the water is used. How many litres are left?
  33. 33.A shop sells 1560 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  34. 34.A town has 1300 people. Its population grows by 20%. How many people live there now?
  35. 35.A water tank holds 700 litres. 5% of the water is used. How many litres are left?
  36. 36.A water tank holds 2140 litres. 30% of the water is used. How many litres are left?
  37. 37.A town has 180 people. Its population grows by 30%. How many people live there now?
  38. 38.A water tank holds 2060 litres. 20% of the water is used. How many litres are left?
  39. 39.A town has 220 people. Its population grows by 50%. How many people live there now?
  40. 40.A town has 2800 people. Its population grows by 30%. How many people live there now?

Answer key

  1. 3825
  2. 20
  3. 3667
  4. 15
  5. 1512
  6. 1890
  7. 4158
  8. 15
  9. 4200
  10. 4.5
  11. 40.5
  12. 15
  13. 456
  14. 110
  15. 1104
  16. 1683
  17. 1035
  18. 20
  19. 72.5
  20. 740
  21. 645
  22. 10
  23. 55
  24. 5
  25. 620
  26. 19
  27. 36
  28. 60
  29. 3781
  30. 936
  31. 1200
  32. 1070
  33. 2028
  34. 1560
  35. 665
  36. 1498
  37. 234
  38. 1648
  39. 330
  40. 3640

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