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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 126 · 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 price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  2. 2.The price of a bicycle is ₹2440. It goes up by 30%. What is the new price (in ₹)?
  3. 3.A shop sells 100 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  4. 4.A water tank holds 1320 litres. 25% of the water is used. How many litres are left?
  5. 5.A water tank holds 4380 litres. 15% of the water is used. How many litres are left?
  6. 6.A water tank holds 2940 litres. 5% of the water is used. How many litres are left?
  7. 7.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  8. 8.A shop sells 4620 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  9. 9.A water tank holds 120 litres. 25% of the water is used. How many litres are left?
  10. 10.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  11. 11.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  12. 12.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  13. 13.A shop sells 4360 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  14. 14.The price of a school bag changes from ₹180 to ₹144. By what percent did it come down?
  15. 15.A shop sells 2820 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  16. 16.A water tank holds 3500 litres. 5% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3400 to ₹1700. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹880 to ₹1100. By what percent did it go up?
  19. 19.A water tank holds 2640 litres. 25% of the water is used. How many litres are left?
  20. 20.A water tank holds 3940 litres. 10% of the water is used. How many litres are left?
  21. 21.A water tank holds 4820 litres. 5% of the water is used. How many litres are left?
  22. 22.A shop sells 2900 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  23. 23.A water tank holds 4400 litres. 5% of the water is used. How many litres are left?
  24. 24.A shop sells 2660 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  25. 25.The price of a school bag changes from ₹3000 to ₹2850. By what percent did it come down?
  26. 26.A town has 3500 people. Its population grows by 40%. How many people live there now?
  27. 27.The price of a school bag changes from ₹1820 to ₹1911. By what percent did it go up?
  28. 28.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  29. 29.The price of a school bag changes from ₹1420 to ₹1207. By what percent did it come down?
  30. 30.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  31. 31.A shop sells 3100 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  32. 32.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  33. 33.A water tank holds 840 litres. 25% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹980 to ₹1127. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹880 to ₹1144. By what percent did it go up?
  36. 36.A water tank holds 3680 litres. 30% of the water is used. How many litres are left?
  37. 37.A water tank holds 2960 litres. 10% of the water is used. How many litres are left?
  38. 38.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 780 litres. 25% of the water is used. How many litres are left?
  40. 40.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =

Answer key

  1. 23.5
  2. 3172
  3. 140
  4. 990
  5. 3723
  6. 2793
  7. 55
  8. 5313
  9. 90
  10. 10.5
  11. 56
  12. 20
  13. 5450
  14. 20
  15. 3948
  16. 3325
  17. 50
  18. 25
  19. 1980
  20. 3546
  21. 4579
  22. 3045
  23. 4180
  24. 3990
  25. 5
  26. 4900
  27. 5
  28. 28
  29. 15
  30. 26.5
  31. 4650
  32. 32
  33. 630
  34. 15
  35. 30
  36. 2576
  37. 2664
  38. 95
  39. 585
  40. 62.5

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