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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 569 · 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 1480 litres. 25% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹520 to ₹650. By what percent did it go up?
  3. 3.A town has 1720 people. Its population grows by 50%. How many people live there now?
  4. 4.A town has 1200 people. Its population grows by 40%. How many people live there now?
  5. 5.A water tank holds 1880 litres. 15% of the water is used. How many litres are left?
  6. 6.The price of a bicycle is ₹1860. It goes up by 5%. What is the new price (in ₹)?
  7. 7.A water tank holds 1620 litres. 25% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1940 to ₹2910. By what percent did it go up?
  9. 9.A water tank holds 2820 litres. 25% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹200 to ₹240. By what percent did it go up?
  11. 11.A shop sells 3360 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  12. 12.The price of a school bag changes from ₹3000 to ₹3750. By what percent did it go up?
  13. 13.A shop sells 3480 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  14. 14.A water tank holds 1420 litres. 40% of the water is used. How many litres are left?
  15. 15.A water tank holds 2900 litres. 40% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹3920 to ₹1960. By what percent did it come down?
  17. 17.The price of a bicycle is ₹2740. It goes up by 30%. What is the new price (in ₹)?
  18. 18.A water tank holds 3160 litres. 5% of the water is used. How many litres are left?
  19. 19.A town has 4720 people. Its population grows by 15%. How many people live there now?
  20. 20.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  21. 21.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  22. 22.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 2620 litres. 5% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹4660 to ₹2330. By what percent did it come down?
  25. 25.The price of a school bag changes from ₹4320 to ₹2592. By what percent did it come down?
  26. 26.The price of a school bag changes from ₹4720 to ₹4248. By what percent did it come down?
  27. 27.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  28. 28.A water tank holds 1080 litres. 20% of the water is used. How many litres are left?
  29. 29.A water tank holds 1520 litres. 25% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹3920 to ₹4116. By what percent did it go up?
  31. 31.A water tank holds 3680 litres. 30% of the water is used. How many litres are left?
  32. 32.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  33. 33.A water tank holds 3400 litres. 40% of the water is used. How many litres are left?
  34. 34.A town has 3480 people. Its population grows by 25%. How many people live there now?
  35. 35.A water tank holds 2320 litres. 50% of the water is used. How many litres are left?
  36. 36.A shop sells 400 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  37. 37.A water tank holds 300 litres. 5% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹2980 to ₹2384. By what percent did it come down?
  39. 39.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  40. 40.A water tank holds 1140 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 1110
  2. 25
  3. 2580
  4. 1680
  5. 1598
  6. 1953
  7. 1215
  8. 50
  9. 2115
  10. 20
  11. 4704
  12. 25
  13. 4002
  14. 852
  15. 1740
  16. 50
  17. 3562
  18. 3002
  19. 5428
  20. 49
  21. 24
  22. 56.25
  23. 2489
  24. 50
  25. 40
  26. 10
  27. 44
  28. 864
  29. 1140
  30. 5
  31. 2576
  32. 14.5
  33. 2040
  34. 4350
  35. 1160
  36. 500
  37. 285
  38. 20
  39. 32.5
  40. 1026

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