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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 791 · 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 shop sells 2520 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  2. 2.A town has 740 people. Its population grows by 15%. How many people live there now?
  3. 3.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  4. 4.A water tank holds 140 litres. 15% of the water is used. How many litres are left?
  5. 5.A shop sells 360 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  6. 6.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  7. 7.The price of a school bag changes from ₹4680 to ₹3744. By what percent did it come down?
  8. 8.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  9. 9.A shop sells 3840 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  10. 10.A water tank holds 1240 litres. 20% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹4140 to ₹2898. By what percent did it come down?
  12. 12.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 140 litres. 30% of the water is used. How many litres are left?
  14. 14.The price of a bicycle is ₹3500. It goes up by 10%. What is the new price (in ₹)?
  15. 15.A water tank holds 860 litres. 15% of the water is used. How many litres are left?
  16. 16.A water tank holds 1160 litres. 50% of the water is used. How many litres are left?
  17. 17.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 240 litres. 20% of the water is used. How many litres are left?
  19. 19.A shop sells 1940 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  20. 20.The price of a bicycle is ₹3420. It goes up by 5%. What is the new price (in ₹)?
  21. 21.The price of a bicycle is ₹340. It goes up by 50%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹940 to ₹987. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹380 to ₹399. By what percent did it go up?
  24. 24.The price of a bicycle is ₹1660. It goes up by 15%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹1300 to ₹1820. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹3360 to ₹2856. By what percent did it come down?
  27. 27.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹4020 to ₹3618. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹1920 to ₹1824. By what percent did it come down?
  30. 30.A water tank holds 2780 litres. 5% of the water is used. How many litres are left?
  31. 31.A town has 80 people. Its population grows by 10%. How many people live there now?
  32. 32.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  33. 33.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  34. 34.A shop sells 2140 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  35. 35.The price of a school bag changes from ₹4700 to ₹3290. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹2140 to ₹2033. By what percent did it come down?
  37. 37.The price of a school bag changes from ₹420 to ₹399. By what percent did it come down?
  38. 38.A water tank holds 640 litres. 5% of the water is used. How many litres are left?
  39. 39.A water tank holds 820 litres. 50% of the water is used. How many litres are left?
  40. 40.A water tank holds 2260 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 3024
  2. 851
  3. 37
  4. 119
  5. 396
  6. 19.25
  7. 20
  8. 15.5
  9. 5376
  10. 992
  11. 30
  12. 20.75
  13. 98
  14. 3850
  15. 731
  16. 580
  17. 80
  18. 192
  19. 2425
  20. 3591
  21. 510
  22. 5
  23. 5
  24. 1909
  25. 40
  26. 15
  27. 43.75
  28. 10
  29. 5
  30. 2641
  31. 88
  32. 37
  33. 65
  34. 2996
  35. 30
  36. 5
  37. 5
  38. 608
  39. 410
  40. 1582

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