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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 175 · 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 1720 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹480 to ₹528. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹2260 to ₹1356. By what percent did it come down?
  4. 4.A water tank holds 4380 litres. 15% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹3360 to ₹4032. By what percent did it go up?
  6. 6.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹500 to ₹575. By what percent did it go up?
  8. 8.The price of a school bag changes from ₹1600 to ₹1520. By what percent did it come down?
  9. 9.A town has 1440 people. Its population grows by 30%. How many people live there now?
  10. 10.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.A shop sells 1540 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  12. 12.A water tank holds 4220 litres. 25% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹2240. It goes up by 15%. What is the new price (in ₹)?
  14. 14.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹1080 to ₹1242. By what percent did it go up?
  16. 16.A water tank holds 60 litres. 25% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3540 to ₹3009. By what percent did it come down?
  18. 18.A town has 2200 people. Its population grows by 30%. How many people live there now?
  19. 19.A water tank holds 3220 litres. 20% of the water is used. How many litres are left?
  20. 20.A water tank holds 300 litres. 10% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹4720 to ₹4248. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹4980 to ₹5727. By what percent did it go up?
  23. 23.A shop sells 1960 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹4480 to ₹4928. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹560 to ₹672. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹4000 to ₹5000. By what percent did it go up?
  27. 27.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  28. 28.A town has 1480 people. Its population grows by 30%. How many people live there now?
  29. 29.The price of a school bag changes from ₹4900 to ₹4655. By what percent did it come down?
  30. 30.The price of a bicycle is ₹1700. It goes up by 40%. What is the new price (in ₹)?
  31. 31.A water tank holds 880 litres. 30% of the water is used. How many litres are left?
  32. 32.A water tank holds 200 litres. 10% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹3160 to ₹3634. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹960 to ₹1248. By what percent did it go up?
  35. 35.A water tank holds 1220 litres. 50% of the water is used. How many litres are left?
  36. 36.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 1520 litres. 40% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹700 to ₹420. By what percent did it come down?
  39. 39.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹4900 to ₹3920. By what percent did it come down?

Answer key

  1. 1634
  2. 10
  3. 40
  4. 3723
  5. 20
  6. 10.25
  7. 15
  8. 5
  9. 1872
  10. 57.5
  11. 1925
  12. 3165
  13. 2576
  14. 19.25
  15. 15
  16. 45
  17. 15
  18. 2860
  19. 2576
  20. 270
  21. 10
  22. 15
  23. 2058
  24. 10
  25. 20
  26. 25
  27. 792
  28. 1924
  29. 5
  30. 2380
  31. 616
  32. 180
  33. 15
  34. 30
  35. 610
  36. 80
  37. 912
  38. 40
  39. 95
  40. 20

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