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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 613 · 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 5% and then goes up by 30% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 1820 litres. 30% of the water is used. How many litres are left?
  3. 3.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  4. 4.The price of a school bag changes from ₹2800 to ₹3220. By what percent did it go up?
  5. 5.A water tank holds 2460 litres. 15% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹2960 to ₹2220. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹2640 to ₹1980. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹880 to ₹836. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹1920 to ₹2112. By what percent did it go up?
  10. 10.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  11. 11.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  12. 12.A shop sells 2940 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  13. 13.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 2440 litres. 25% of the water is used. How many litres are left?
  15. 15.A town has 760 people. Its population grows by 10%. How many people live there now?
  16. 16.A water tank holds 200 litres. 20% of the water is used. How many litres are left?
  17. 17.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  18. 18.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹5000 to ₹6250. By what percent did it go up?
  20. 20.A shop sells 4780 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  21. 21.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  22. 22.A water tank holds 1040 litres. 25% of the water is used. How many litres are left?
  23. 23.A water tank holds 800 litres. 30% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹3240. It goes up by 15%. What is the new price (in ₹)?
  25. 25.A shop sells 2960 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹1920 to ₹2496. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹4300 to ₹5160. By what percent did it go up?
  28. 28.A water tank holds 940 litres. 50% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹2840 to ₹3550. By what percent did it go up?
  30. 30.A water tank holds 600 litres. 15% of the water is used. How many litres are left?
  31. 31.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 4980 litres. 25% of the water is used. How many litres are left?
  33. 33.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹2100 to ₹2415. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹3900 to ₹5850. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹780 to ₹1170. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹4160 to ₹2080. By what percent did it come down?
  38. 38.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 3300 litres. 25% of the water is used. How many litres are left?
  40. 40.A shop sells 1560 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?

Answer key

  1. 36.5
  2. 1274
  3. 33.5
  4. 15
  5. 2091
  6. 25
  7. 25
  8. 5
  9. 10
  10. 43
  11. 54
  12. 4410
  13. 38
  14. 1830
  15. 836
  16. 160
  17. 49
  18. 56
  19. 25
  20. 5258
  21. 12
  22. 780
  23. 560
  24. 3726
  25. 3552
  26. 30
  27. 20
  28. 470
  29. 25
  30. 510
  31. 56.25
  32. 3735
  33. 36.25
  34. 15
  35. 50
  36. 50
  37. 50
  38. 15.5
  39. 2475
  40. 1638

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