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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 901 · 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 4960 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2800 to ₹2240. By what percent did it come down?
  3. 3.A town has 4000 people. Its population grows by 20%. How many people live there now?
  4. 4.A shop sells 1020 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  5. 5.A town has 3820 people. Its population grows by 10%. How many people live there now?
  6. 6.A town has 1440 people. Its population grows by 30%. How many people live there now?
  7. 7.A water tank holds 3960 litres. 10% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹3320 to ₹4980. By what percent did it go up?
  9. 9.The price of a bicycle is ₹3820. It goes up by 10%. What is the new price (in ₹)?
  10. 10.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  11. 11.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  12. 12.The price of a bicycle is ₹2380. It goes up by 10%. What is the new price (in ₹)?
  13. 13.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  14. 14.The price of a bicycle is ₹2320. It goes up by 25%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹1340 to ₹938. By what percent did it come down?
  16. 16.The price of a bicycle is ₹3660. It goes up by 25%. What is the new price (in ₹)?
  17. 17.A town has 3440 people. Its population grows by 40%. How many people live there now?
  18. 18.A shop sells 2820 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  19. 19.A water tank holds 1280 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹2940 to ₹3675. By what percent did it go up?
  21. 21.A water tank holds 1540 litres. 50% of the water is used. How many litres are left?
  22. 22.A water tank holds 980 litres. 10% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹3740. It goes up by 25%. What is the new price (in ₹)?
  24. 24.A water tank holds 4620 litres. 20% of the water is used. How many litres are left?
  25. 25.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  26. 26.The price of a school bag changes from ₹2920 to ₹2190. By what percent did it come down?
  27. 27.The price of a bicycle is ₹580. It goes up by 50%. What is the new price (in ₹)?
  28. 28.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹2620 to ₹3013. By what percent did it go up?
  30. 30.A water tank holds 800 litres. 10% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹3180 to ₹3657. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹2140 to ₹2461. By what percent did it go up?
  33. 33.The price of a bicycle is ₹940. It goes up by 20%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹3260 to ₹2934. By what percent did it come down?
  35. 35.A water tank holds 2320 litres. 10% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹4100. It goes up by 25%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹2820 to ₹1410. By what percent did it come down?
  38. 38.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹2880 to ₹4032. By what percent did it go up?
  40. 40.A water tank holds 2680 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 4712
  2. 20
  3. 4800
  4. 1326
  5. 4202
  6. 1872
  7. 3564
  8. 50
  9. 4202
  10. 36.25
  11. 33.5
  12. 2618
  13. 28.75
  14. 2900
  15. 30
  16. 4575
  17. 4816
  18. 2961
  19. 896
  20. 25
  21. 770
  22. 882
  23. 4675
  24. 3696
  25. 14.5
  26. 25
  27. 870
  28. 24
  29. 15
  30. 720
  31. 15
  32. 15
  33. 1128
  34. 10
  35. 2088
  36. 5125
  37. 50
  38. 32
  39. 40
  40. 1340

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