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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 189 · 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 town has 660 people. Its population grows by 30%. How many people live there now?
  2. 2.A water tank holds 60 litres. 5% of the water is used. How many litres are left?
  3. 3.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  4. 4.A shop sells 2940 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  5. 5.A water tank holds 740 litres. 15% of the water is used. How many litres are left?
  6. 6.A shop sells 820 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 bicycle is ₹4820. It goes up by 10%. What is the new price (in ₹)?
  8. 8.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  9. 9.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹2380 to ₹2142. By what percent did it come down?
  11. 11.A water tank holds 1980 litres. 40% of the water is used. How many litres are left?
  12. 12.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  13. 13.The price of a school bag changes from ₹5000 to ₹5500. By what percent did it go up?
  14. 14.A town has 100 people. Its population grows by 25%. How many people live there now?
  15. 15.The price of a school bag changes from ₹4660 to ₹3728. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹4500 to ₹4950. By what percent did it go up?
  17. 17.The price of a bicycle is ₹3580. It goes up by 5%. What is the new price (in ₹)?
  18. 18.A water tank holds 840 litres. 15% of the water is used. How many litres are left?
  19. 19.The price of a bicycle is ₹3800. It goes up by 50%. What is the new price (in ₹)?
  20. 20.A town has 4700 people. Its population grows by 25%. How many people live there now?
  21. 21.The price of a school bag changes from ₹2700 to ₹4050. By what percent did it go up?
  22. 22.The price of a bicycle is ₹740. It goes up by 30%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹3000 to ₹4200. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹3880 to ₹3686. By what percent did it come down?
  25. 25.A water tank holds 780 litres. 20% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹180 to ₹90. By what percent did it come down?
  27. 27.A town has 880 people. Its population grows by 50%. How many people live there now?
  28. 28.A shop sells 2940 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  29. 29.The price of a school bag changes from ₹4580 to ₹6412. By what percent did it go up?
  30. 30.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 4920 litres. 15% of the water is used. How many litres are left?
  32. 32.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹800 to ₹720. By what percent did it come down?
  34. 34.A water tank holds 4380 litres. 30% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹4000 to ₹5200. By what percent did it go up?
  36. 36.The price of a bicycle is ₹1380. It goes up by 20%. What is the new price (in ₹)?
  37. 37.A town has 560 people. Its population grows by 5%. How many people live there now?
  38. 38.A water tank holds 3200 litres. 25% of the water is used. How many litres are left?
  39. 39.A town has 4440 people. Its population grows by 15%. How many people live there now?
  40. 40.A shop sells 480 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?

Answer key

  1. 858
  2. 57
  3. 54
  4. 4410
  5. 629
  6. 1148
  7. 5302
  8. 55
  9. 43
  10. 10
  11. 1188
  12. 51
  13. 10
  14. 125
  15. 20
  16. 10
  17. 3759
  18. 714
  19. 5700
  20. 5875
  21. 50
  22. 962
  23. 40
  24. 5
  25. 624
  26. 50
  27. 1320
  28. 3381
  29. 40
  30. 32
  31. 4182
  32. 3.5
  33. 10
  34. 3066
  35. 30
  36. 1656
  37. 588
  38. 2400
  39. 5106
  40. 552

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