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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 231 · 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 540 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1980 to ₹1782. By what percent did it come down?
  3. 3.A water tank holds 4960 litres. 50% of the water is used. How many litres are left?
  4. 4.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  5. 5.A water tank holds 3000 litres. 5% of the water is used. How many litres are left?
  6. 6.A shop sells 5000 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  7. 7.The price of a school bag changes from ₹2920 to ₹3504. By what percent did it go up?
  8. 8.A water tank holds 2200 litres. 5% of the water is used. How many litres are left?
  9. 9.A shop sells 920 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  10. 10.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  11. 11.A shop sells 1240 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  12. 12.The price of a school bag changes from ₹1240 to ₹1302. By what percent did it go up?
  13. 13.A water tank holds 4740 litres. 20% of the water is used. How many litres are left?
  14. 14.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹3480. It goes up by 20%. What is the new price (in ₹)?
  16. 16.A town has 700 people. Its population grows by 40%. How many people live there now?
  17. 17.A water tank holds 4680 litres. 10% of the water is used. How many litres are left?
  18. 18.A water tank holds 820 litres. 15% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹220 to ₹242. By what percent did it go up?
  20. 20.A water tank holds 660 litres. 40% of the water is used. How many litres are left?
  21. 21.A water tank holds 800 litres. 50% of the water is used. How many litres are left?
  22. 22.A water tank holds 1200 litres. 15% of the water is used. How many litres are left?
  23. 23.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  24. 24.A town has 1580 people. Its population grows by 25%. How many people live there now?
  25. 25.The price of a bicycle is ₹4900. It goes up by 10%. What is the new price (in ₹)?
  26. 26.A shop sells 300 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  27. 27.The price of a bicycle is ₹1000. It goes up by 10%. What is the new price (in ₹)?
  28. 28.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹4240 to ₹5512. By what percent did it go up?
  30. 30.A water tank holds 940 litres. 25% of the water is used. How many litres are left?
  31. 31.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹2000 to ₹1900. By what percent did it come down?
  33. 33.A water tank holds 4340 litres. 30% of the water is used. How many litres are left?
  34. 34.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  35. 35.The price of a bicycle is ₹1180. It goes up by 15%. What is the new price (in ₹)?
  36. 36.A town has 3760 people. Its population grows by 40%. How many people live there now?
  37. 37.The price of a school bag changes from ₹400 to ₹480. By what percent did it go up?
  38. 38.A shop sells 4460 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  39. 39.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  40. 40.The price of a school bag changes from ₹2360 to ₹2478. By what percent did it go up?

Answer key

  1. 432
  2. 10
  3. 2480
  4. 36
  5. 2850
  6. 7000
  7. 20
  8. 2090
  9. 1058
  10. 43
  11. 1488
  12. 5
  13. 3792
  14. 75
  15. 4176
  16. 980
  17. 4212
  18. 697
  19. 10
  20. 396
  21. 400
  22. 1020
  23. 14
  24. 1975
  25. 5390
  26. 375
  27. 1100
  28. 33.5
  29. 30
  30. 705
  31. 4
  32. 5
  33. 3038
  34. 56
  35. 1357
  36. 5264
  37. 20
  38. 5352
  39. 15.5
  40. 5

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