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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 843 · 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 80 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  2. 2.A water tank holds 2140 litres. 40% of the water is used. How many litres are left?
  3. 3.A town has 4720 people. Its population grows by 15%. How many people live there now?
  4. 4.A shop sells 1760 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  5. 5.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  6. 6.The price of a bicycle is ₹2700. It goes up by 15%. What is the new price (in ₹)?
  7. 7.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  8. 8.A shop sells 1040 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹3160 to ₹4424. By what percent did it go up?
  10. 10.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  11. 11.The price of a bicycle is ₹120. It goes up by 10%. What is the new price (in ₹)?
  12. 12.A water tank holds 1880 litres. 30% of the water is used. How many litres are left?
  13. 13.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹360 to ₹396. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹1400 to ₹1120. By what percent did it come down?
  16. 16.The price of a bicycle is ₹3600. It goes up by 50%. What is the new price (in ₹)?
  17. 17.A shop sells 3480 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  18. 18.A water tank holds 4780 litres. 30% of the water is used. How many litres are left?
  19. 19.A water tank holds 2740 litres. 20% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹280 to ₹196. By what percent did it come down?
  21. 21.A water tank holds 3140 litres. 10% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹2160 to ₹2052. By what percent did it come down?
  23. 23.A water tank holds 4400 litres. 20% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹4420. It goes up by 25%. What is the new price (in ₹)?
  25. 25.A water tank holds 3940 litres. 50% of the water is used. How many litres are left?
  26. 26.A water tank holds 4080 litres. 15% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹1900 to ₹1805. By what percent did it come down?
  28. 28.A water tank holds 3940 litres. 20% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹3100. It goes up by 30%. What is the new price (in ₹)?
  30. 30.A water tank holds 400 litres. 50% of the water is used. How many litres are left?
  31. 31.A shop sells 500 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  32. 32.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  33. 33.A water tank holds 3040 litres. 40% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹3880 to ₹5044. By what percent did it go up?
  35. 35.A town has 4660 people. Its population grows by 50%. How many people live there now?
  36. 36.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹380 to ₹475. By what percent did it go up?
  38. 38.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹2360 to ₹3304. By what percent did it go up?
  40. 40.The price of a bicycle is ₹4700. It goes up by 30%. What is the new price (in ₹)?

Answer key

  1. 120
  2. 1284
  3. 5428
  4. 2464
  5. 110
  6. 3105
  7. 27.5
  8. 1144
  9. 40
  10. 12
  11. 132
  12. 1316
  13. 52
  14. 10
  15. 20
  16. 5400
  17. 4350
  18. 3346
  19. 2192
  20. 30
  21. 2826
  22. 5
  23. 3520
  24. 5525
  25. 1970
  26. 3468
  27. 5
  28. 3152
  29. 4030
  30. 200
  31. 650
  32. 56
  33. 1824
  34. 30
  35. 6990
  36. 75
  37. 25
  38. 49
  39. 40
  40. 6110

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