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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 783 · 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 1800 litres. 15% of the water is used. How many litres are left?
  2. 2.A water tank holds 600 litres. 40% of the water is used. How many litres are left?
  3. 3.A town has 3540 people. Its population grows by 15%. How many people live there now?
  4. 4.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  5. 5.The price of a bicycle is ₹260. It goes up by 30%. What is the new price (in ₹)?
  6. 6.A town has 1580 people. Its population grows by 20%. How many people live there now?
  7. 7.The price of a school bag changes from ₹2740 to ₹2877. By what percent did it go up?
  8. 8.A water tank holds 3860 litres. 15% of the water is used. How many litres are left?
  9. 9.A town has 1620 people. Its population grows by 30%. How many people live there now?
  10. 10.The price of a school bag changes from ₹1060 to ₹1590. By what percent did it go up?
  11. 11.A town has 4840 people. Its population grows by 30%. How many people live there now?
  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 water tank holds 3260 litres. 40% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹4380 to ₹5037. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹3040 to ₹3344. By what percent did it go up?
  16. 16.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹4600 to ₹4140. By what percent did it come down?
  18. 18.A water tank holds 1040 litres. 10% of the water is used. How many litres are left?
  19. 19.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹520 to ₹390. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹3720 to ₹4650. By what percent did it go up?
  22. 22.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  23. 23.The price of a school bag changes from ₹1480 to ₹1332. By what percent did it come down?
  24. 24.A water tank holds 3740 litres. 5% of the water is used. How many litres are left?
  25. 25.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹3060. It goes up by 25%. What is the new price (in ₹)?
  27. 27.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  28. 28.The price of a bicycle is ₹2880. It goes up by 5%. What is the new price (in ₹)?
  29. 29.A shop sells 1580 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹4180 to ₹2090. By what percent did it come down?
  31. 31.A town has 2260 people. Its population grows by 20%. How many people live there now?
  32. 32.A shop sells 3200 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  33. 33.A water tank holds 3840 litres. 30% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹340. It goes up by 25%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹560 to ₹588. By what percent did it go up?
  36. 36.A shop sells 4360 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹1140 to ₹1425. By what percent did it go up?
  38. 38.A shop sells 1060 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  39. 39.The price of a school bag changes from ₹2780 to ₹3336. By what percent did it go up?
  40. 40.The price of a school bag changes from ₹2520 to ₹3276. By what percent did it go up?

Answer key

  1. 1530
  2. 360
  3. 4071
  4. 110
  5. 338
  6. 1896
  7. 5
  8. 3281
  9. 2106
  10. 50
  11. 6292
  12. 82
  13. 1956
  14. 15
  15. 10
  16. 65
  17. 10
  18. 936
  19. 36.5
  20. 25
  21. 25
  22. 58
  23. 10
  24. 3553
  25. 95
  26. 3825
  27. 14.5
  28. 3024
  29. 1896
  30. 50
  31. 2712
  32. 3360
  33. 2688
  34. 425
  35. 5
  36. 4578
  37. 25
  38. 1219
  39. 20
  40. 30

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