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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 950 · 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 3200 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  2. 2.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  3. 3.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  4. 4.The price of a bicycle is ₹820. It goes up by 5%. What is the new price (in ₹)?
  5. 5.The price of a bicycle is ₹2560. It goes up by 5%. What is the new price (in ₹)?
  6. 6.A water tank holds 4180 litres. 15% of the water is used. How many litres are left?
  7. 7.A water tank holds 4240 litres. 30% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹2920 to ₹3212. By what percent did it go up?
  9. 9.A water tank holds 2820 litres. 30% of the water is used. How many litres are left?
  10. 10.A water tank holds 4860 litres. 40% of the water is used. How many litres are left?
  11. 11.A water tank holds 3780 litres. 40% of the water is used. How many litres are left?
  12. 12.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  13. 13.A town has 1960 people. Its population grows by 15%. How many people live there now?
  14. 14.A water tank holds 240 litres. 15% of the water is used. How many litres are left?
  15. 15.A water tank holds 1400 litres. 25% of the water is used. How many litres are left?
  16. 16.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  17. 17.The price of a bicycle is ₹1140. It goes up by 5%. What is the new price (in ₹)?
  18. 18.A town has 2800 people. Its population grows by 30%. How many people live there now?
  19. 19.The price of a school bag changes from ₹4340 to ₹3038. By what percent did it come down?
  20. 20.A water tank holds 2320 litres. 40% of the water is used. How many litres are left?
  21. 21.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 120 litres. 30% of the water is used. How many litres are left?
  23. 23.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 4700 litres. 15% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹3300 to ₹4950. By what percent did it go up?
  26. 26.A water tank holds 1400 litres. 40% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹3640 to ₹2548. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹4240 to ₹5936. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹3240 to ₹4050. By what percent did it go up?
  30. 30.A shop sells 3360 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  31. 31.The price of a school bag changes from ₹4140 to ₹3933. By what percent did it come down?
  32. 32.A water tank holds 1920 litres. 15% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹4760 to ₹3808. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹2860 to ₹3146. By what percent did it go up?
  35. 35.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  36. 36.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹960 to ₹576. By what percent did it come down?
  38. 38.A shop sells 660 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  39. 39.The price of a school bag changes from ₹260 to ₹273. By what percent did it go up?
  40. 40.A town has 1440 people. Its population grows by 10%. How many people live there now?

Answer key

  1. 4160
  2. 10.25
  3. 32
  4. 861
  5. 2688
  6. 3553
  7. 2968
  8. 10
  9. 1974
  10. 2916
  11. 2268
  12. 82
  13. 2254
  14. 204
  15. 1050
  16. 75
  17. 1197
  18. 3640
  19. 30
  20. 1392
  21. 61
  22. 84
  23. 36.5
  24. 3995
  25. 50
  26. 840
  27. 30
  28. 40
  29. 25
  30. 4704
  31. 5
  32. 1632
  33. 20
  34. 10
  35. 56
  36. 110
  37. 40
  38. 990
  39. 5
  40. 1584

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