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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 570 · 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 960 litres. 25% of the water is used. How many litres are left?
  2. 2.A shop sells 2820 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  3. 3.A water tank holds 2740 litres. 15% of the water is used. How many litres are left?
  4. 4.A town has 620 people. Its population grows by 10%. How many people live there now?
  5. 5.The price of a bicycle is ₹4000. It goes up by 10%. What is the new price (in ₹)?
  6. 6.A water tank holds 2680 litres. 25% of the water is used. How many litres are left?
  7. 7.A shop sells 740 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  8. 8.A water tank holds 1360 litres. 15% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹1600 to ₹1200. By what percent did it come down?
  10. 10.A town has 3860 people. Its population grows by 30%. How many people live there now?
  11. 11.A water tank holds 3640 litres. 10% of the water is used. How many litres are left?
  12. 12.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹2680 to ₹1340. By what percent did it come down?
  14. 14.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹460 to ₹322. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹2640 to ₹2904. By what percent did it go up?
  17. 17.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  18. 18.The price of a school bag changes from ₹4260 to ₹2130. By what percent did it come down?
  19. 19.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹1240 to ₹1426. By what percent did it go up?
  21. 21.A water tank holds 740 litres. 30% of the water is used. How many litres are left?
  22. 22.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  23. 23.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  24. 24.A water tank holds 2000 litres. 50% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹4280 to ₹3210. By what percent did it come down?
  26. 26.The price of a bicycle is ₹3820. It goes up by 25%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹3500 to ₹3850. By what percent did it go up?
  28. 28.The price of a bicycle is ₹4960. It goes up by 25%. What is the new price (in ₹)?
  29. 29.A water tank holds 1400 litres. 40% of the water is used. How many litres are left?
  30. 30.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  31. 31.A water tank holds 480 litres. 40% of the water is used. How many litres are left?
  32. 32.A water tank holds 3960 litres. 20% of the water is used. How many litres are left?
  33. 33.A water tank holds 4320 litres. 25% of the water is used. How many litres are left?
  34. 34.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  35. 35.A water tank holds 4320 litres. 30% of the water is used. How many litres are left?
  36. 36.A water tank holds 2720 litres. 20% of the water is used. How many litres are left?
  37. 37.A shop sells 3020 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  38. 38.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  39. 39.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹2860 to ₹2288. By what percent did it come down?

Answer key

  1. 720
  2. 3666
  3. 2329
  4. 682
  5. 4400
  6. 2010
  7. 814
  8. 1156
  9. 25
  10. 5018
  11. 3276
  12. 57.5
  13. 50
  14. 47.5
  15. 30
  16. 10
  17. 46
  18. 50
  19. 95
  20. 15
  21. 518
  22. 12.5
  23. 32.5
  24. 1000
  25. 25
  26. 4775
  27. 10
  28. 6200
  29. 840
  30. 17
  31. 288
  32. 3168
  33. 3240
  34. 43.75
  35. 3024
  36. 2176
  37. 3322
  38. 14.5
  39. 32.25
  40. 20

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