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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 886 · 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.The price of a school bag changes from ₹3200 to ₹4480. By what percent did it go up?
  2. 2.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  3. 3.A water tank holds 2240 litres. 50% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹2580 to ₹3354. By what percent did it go up?
  5. 5.A water tank holds 2340 litres. 30% of the water is used. How many litres are left?
  6. 6.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 4160 litres. 25% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹3380 to ₹3718. By what percent did it go up?
  9. 9.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  10. 10.The price of a bicycle is ₹840. It goes up by 40%. What is the new price (in ₹)?
  11. 11.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  12. 12.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  13. 13.A town has 4140 people. Its population grows by 15%. How many people live there now?
  14. 14.A water tank holds 1400 litres. 30% of the water is used. How many litres are left?
  15. 15.A water tank holds 220 litres. 30% of the water is used. How many litres are left?
  16. 16.A water tank holds 3920 litres. 10% of the water is used. How many litres are left?
  17. 17.A water tank holds 3560 litres. 10% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹480 to ₹672. By what percent did it go up?
  19. 19.The price of a bicycle is ₹3100. It goes up by 20%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹2480 to ₹1736. By what percent did it come down?
  21. 21.A water tank holds 3740 litres. 30% of the water is used. How many litres are left?
  22. 22.A shop sells 4020 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  23. 23.A water tank holds 2340 litres. 15% of the water is used. How many litres are left?
  24. 24.A water tank holds 1220 litres. 25% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹520 to ₹598. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹4800 to ₹6000. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹4120 to ₹2884. By what percent did it come down?
  28. 28.The price of a bicycle is ₹2560. It goes up by 10%. What is the new price (in ₹)?
  29. 29.The price of a bicycle is ₹3360. It goes up by 25%. What is the new price (in ₹)?
  30. 30.The price of a school bag changes from ₹2840 to ₹3976. By what percent did it go up?
  31. 31.A town has 1080 people. Its population grows by 20%. How many people live there now?
  32. 32.A water tank holds 4900 litres. 15% of the water is used. How many litres are left?
  33. 33.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.The price of a school bag changes from ₹2340 to ₹2925. By what percent did it go up?
  35. 35.A water tank holds 2940 litres. 15% of the water is used. How many litres are left?
  36. 36.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  37. 37.A shop sells 1980 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  38. 38.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  39. 39.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  40. 40.A water tank holds 3040 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 40
  2. 40.5
  3. 1120
  4. 30
  5. 1638
  6. 43
  7. 3120
  8. 10
  9. 14.5
  10. 1176
  11. 15.5
  12. 19
  13. 4761
  14. 980
  15. 154
  16. 3528
  17. 3204
  18. 40
  19. 3720
  20. 30
  21. 2618
  22. 4422
  23. 1989
  24. 915
  25. 15
  26. 25
  27. 30
  28. 2816
  29. 4200
  30. 40
  31. 1296
  32. 4165
  33. 37.5
  34. 25
  35. 2499
  36. 55
  37. 2178
  38. 65
  39. 57.5
  40. 2432

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